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Opal

This page kindly sponsored by Danny J. Sanchez
Formula:
SiO2 · nH2O
Colour:
Colorless, white, ...
Hardness:
5½ - 6½
Name:
The origin of the name is uncertain. It may be from the Sanskrit "upala", meaning "stone" or "precious stone" or from opalus, the ancient Latin name for the gem (Pliny the elder, 75-79). Pliny may have also referred to the gem as paederos, but modern commentary by Kostov (2008) question if that name was actually applied to the opal of modern sense.
Although it is still (2007) regarded as a valid mineral species for historical reasons, Opal is not a true mineral in the accepted sense of the word as it is either composed of Cristobalite and/or Tridymite or composed of amorphous silica.

Opal is classified into four types:

Opal-CT Cristobalite-Tridymite
Opal-C Cristobalite
Opal-AG Amorphous-Gel (closely packed amorphous silica spheres form a diffraction grating to create Precious Opal).
Opal-AN Amorphous-Network (found as Hyalite)

Transitions between opal-AG, opal-CT and opal-C are common.


Visit gemdat.org for gemological information about Opal.

Classification of Opal

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.DA.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
A : With small cations: Silica family
75.2.1.1

75 : TECTOSILICATES Si Tetrahedral Frameworks
2 : Si Tetrahedral Frameworks - SiO2 with H2O and organics
7.8.8

7 : Oxides and Hydroxides
8 : Oxides of Si
mindat.org URL:
http://www.mindat.org/min-3004.html
Please feel free to link to this page.

Occurrences of Opal

Geological Setting:
Altering volcanic tuffs, basalts. Silicous deep-water marine sediments. Opal-C, opal-CT and opal-AG formation is restricted to low pressure and low temperature environments.

Physical Properties of Opal

Vitreous, Waxy, Greasy, Dull
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colorless, white, yellow, red, orange, green, brown, black, blue
Streak:
White
Hardness (Mohs):
5½ - 6½
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Splintery, Conchoidal
Density:
1.9 - 2.3 g/cm3 (Measured)    

Optical Data of Opal

Type:
Isotropic
RI values:
nα = 1.400 - 1.460
Birefringence:
Opal-AG and Opal-AG are optically isotropic, but may show anomalous birefringence due to strain. The microcrystalline varieties show birefringence: opal-C is length-fast, opal-CT is length-slow, but almost isotropic.
Max Birefringence:
δ = 1.400 - Isotropic minerals have no birefringence
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic

Chemical Properties of Opal

Formula:
SiO2 · nH2O
Essential elements:
All elements listed in formula:
Analytical Data:
Contains 2 - 10% water.

Relationship of Opal to other Species

4.DA.05QuartzSiO2
4.DA.10TridymiteSiO2
4.DA.15CristobaliteSiO2
4.DA.20MogániteSiO2
4.DA.25Melanophlogite46SiO2 · 6(N2,CO2) · 2(CH4,N2)
4.DA.30LechatelieriteSiO2
4.DA.35CoesiteSiO2
4.DA.40StishoviteSiO2
4.DA.45KeatiteSiO2
4.DA.50SeifertiteSiO2
7.8.1QuartzSiO2
7.8.2CoesiteSiO2
7.8.3TridymiteSiO2
7.8.4StishoviteSiO2
7.8.5CristobaliteSiO2
7.8.6LechatelieriteSiO2
7.8.7Silhydrite3SiO2 · H2O
7.8.9MogániteSiO2

Other Names for Opal

Name in Other Languages:
Basque:Opalo
Bosnian (Latin Script):Opal
Bulgarian:Опал
Czech:Opál
Dutch:Opaal
Esperanto:Opalo
Estonian:Opaal
Finnish:Opaali
French:Opale
Galician:Ópalo
Hungarian:Opál
Italian:Opale
Japanese:オパール
Lithuanian:Opalas
Norwegian (Bokmål):Opal
Polish:Opal
Portuguese:Opala
Romanian:Opal
Russian:Опал
Simplified Chinese:蛋白石
Slovak:Opál
Slovenian:Opal
Swedish:Opal
Traditional Chinese:蛋白石
Turkish:Opal
Ukrainian:Опал
Vietnamese:Đá opal

Other Information

Yellow to green (uranyl)
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:
Gemstones

References for Opal

Reference List:
Jones, J.B. and E.R. Segnit (1971) The nature of opal. I Nomenclature and constituent phases. Journal of the Geological Society of Australia, 18: 57-68.

Elzea, J.M., Odom, I.E., Miles, W.J. (1994) Distinguishing well ordered opal-CT and opal-C from high temperature cristobalite by X-ray diffraction. Analytica Chimica Acta 286, 107-116.

Graetsch, H. (1994) Structural characteristics of opaline and microcrystalline silica minerals. In: Reviews in Mineralogy, Volume 29, Silica - Physical behavior, geochemistry and materials applications. Mineralogical Society of America, Washington, D.C.

Li, D., Bancroft, G.M., Kasrai, M., Fleet, M.E., Secco, R.A., Feng,X.H., Tan, K.H., and Yang, B.X. (1994) X-ray absorption spectroscopy of silicon dioxide (SiO2) polymorphs: the structural characterization of opal. American Mineralogist, 79: 622-632.

Lapis Extra No. 10, Opal (1996).

Gaillou, E., Fritsch, E., Aguilar-Reyes, B., Rondeau, B., Post, J., Barreau, A., Ostroumov, M. (2008) Common gem opal: An investigation of micro- to nano-structure. American Mineralogist, 93, 1865-1873.

Kostov, Rusian I. (2008) Orphic Lithica As A Source Of Late Antiquity Mineralogical Knowledge, Annual Of The University Of Mining And Geology “ST. Ivan Rilski”, Vol. 51, Part I, Geology And Geophysics, p. 109-115.

Adamo, I., Ghisoli, C. & Caucia, F. (2010) A contribution to the study of FTIR spectra of opals. Neues Jahrbuch für Mineralogie - Abhandlungen 187, 63-68.

Caucia, Franca; Ghisoli, Christian; Marinoni, Luigi; Bordoni, Valentina (2013): Opal, a beautiful gem between myth and reality. Neues Jahrbuch für Mineralogie - Abhandlungen, 190, 1-9.

Eckert, Jürgen; Gourdon, Olivier; Jacob, Dorrit E.; Meral, Cagla; Monteiro, Paulo J.M.; Vogel, Sven C.; Wirth, Richard; Wenk, Hans-Rudolf (2015): Ordering of water in opals with different microstructures. European Journal of Mineralogy, 27, 203-213.

Internet Links for Opal

Specimens:
The following Opal specimens are currently listed for sale on minfind.com.

Localities for Opal

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Afghanistan
 
  • Badakhshan Province (Badakshan Province; Badahsan Province)
    • Zebak District
      • Sanglich
Orris, G.J., and Bliss, J.D. (2002): Mines and Mineral Occurrences of Afghanistan. United States Geological Survey Open-File Report 02-110
  • Balkh Province (Balh Province)
    • Chimtal District
[var: Diatomite] Orris, G.J., and Bliss, J.D. (2002): Mines and Mineral Occurrences of Afghanistan. United States Geological Survey Open-File Report 02-110
  • Nuristan Province (Nurestan Province; Nooristan Province; Nuristan)
    • Kamdesh District
[var: Hyalite] Jose Zendrera collection
Algeria
 
  • Oran Province
    • Ouillis - Pont du Chelif area
[var: Menilite] Rocks & Min.: 17:243.
Angola
 
  • Luanda Province
[var: Milk Opal] Martins da Pedra collection
Antarctica
 
  • Eastern Antarctica
    • Victoria Land
Galli E, Vezzalini G, Quartieri S, Alberti A, Franzini M (1997) Mutinaite, a new zeolite from Antarctica: the natural counterpart of ZSM-5, Zeolites 19, 318-322
Argentina
 
  • Catamarca
    • Andalgalá Department
Raúl Jorge Tauber Larry photo and collection
Raúl Jorge Tauber Larry
Raúl Jorge Tauber Larry (1971). Informe personal de la visita a la Estancia "´Cóndor Huasi" en Las Estancias Departamento Andalgalá, Provincia de Catamarca, Argentina.
    • Antofagasta de la Sierra Department
Raúl J. Tauber Larry
    • Belén Department
[var: Opal-AN] Padrón de Minas de la Provincia de Catamarca.
  • Chubut
    • Cushamen Department
Padrón de Minas de la Provincia de Chubut (2005).
    • Gastre Department
Padrón de Minas de la Provincia de Chubut (2005).
    • Languiñeo department
      • Piedra Parada
ARAGON, E. et al. Petrogenesis of thundereggs in Eocene rhyolite domes of central Chubut, Patagonia. Rev. Asoc. Geol. Argent. [online]. 2006, vol.61, n.3, pp. 347-354.
[var: Opal-AN] Padrón de Minas de la Provincia de Chubut (2005).
    • Paso de Indios department
      • El Sombrero
        • Sierra Cuadrada deposit
[var: Wood Opal] Raúl Jorge Tauber Larry C. T. Friz, F. Rodrigo y P.N. Stipanicic - Recursos y posibilidades Uraníferas en Argentina. Session 2.11 P/405. Comision Nacional de Energia Atomica. Victorio Angelelli (1958) Los minerales de Uranio sus yacimientos y prospección. Departamento de Geología y Minería. Comision Nacional de Energia Atomica.
    • Telsen Department
Padrón de Minas de la Provincia de Chubut (2005).
  • Córdoba
[var: Opal-AN] LEAL, P.R.; CORTONA, O. y PAGAN, F.J.. Vetas de cuarzo en el sur de Santiago del Estero. Rev. Asoc. Geol. Argent. [online]. 2005, vol.60, n.2, pp. 389-401
    • Punilla Department
      • Tanti
        • Cerro Blanco pegmatite district
Alfredo Petrov specimens
    • San Alberto Department
      • Mina Clavero
[var: Milk Opal] C. Lemanski, Jr. (re-entry of lost Mindat data).
    • Sierra de Ambargasta
LEAL, Pablo Rodrigo and GONZALEZ, María Paz. Mineralogy and fluid inclusion of LaBaritina: theuppermost sector of the manganese mineralization of sierra de Ambargasta, province of Córdoba. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.4, pp. 672-684
  • Entre Ríos
[var: Wood Opal] Juan Carlos Lodovichi
Raúl Jorge Tauber Larry (1967). Visita al arroyo Espinillo en la Provincia de Entre Ríos.
Raúl Jorge Tauber Larry (1967). Visita al arroyo Espinillo en la Provincia de Entre Ríos.
  • Jujuy
Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina)
  • La Rioja
    • Coronel Felipe Varela department
      • Guandacol
LEAL, P.R.; CORTONA, O. y PAGAN, F.J.. Vetas de cuarzo en el sur de Santiago del Estero. Rev. Asoc. Geol. Argent. [online]. 2005, vol.60, n.2, pp. 389-401
Ra{ul J. Tauber Larry
  • Mendoza
    • Malargüe Department
      • Altiplano de Payún Matru
[var: Opal-AN] Alfredo Petrov collection
    • San Rafael Department
Aguirre-Urreta, M. B.(1), Rawson, P. F.(2), Concheyro, G. A.(1), Bown, P. R.(2) & Ottone, E. G.(1).
  • Neuquén
Montagne, A. O., Ponce, J. J. y Buhler, M. (2014). Geología de la cuenca Neuquina y sus sistemas petroleros. Fundación YPF-Universidad Nacional de Río Negro, Argentina.
Tauber, S. (November 2014)
Tauber, S.
    • Collón Curá Department
Mirta Quattrocchio(1), Marcelo Martínez(1,2), Vivian García1 y Carlos Zavala(1). BIOEVENTO DEL VALANGINIANO TARDÍO EN EL CENTRO-OESTE DE LA CUENCA NEUQUINA.
    • Loncopué Department
Aguirre-Urreta, M. B.(1), Rawson, P. F.(2), Concheyro, G. A.(1), Bown, P. R.(2) & Ottone, E. G.(1)
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
Montagne, A. O., Ponce, J. J. y Buhler, M. (2014). Geología de la cuenca Neuquina y sus sistemas petroleros. Fundación YPF-Universidad Nacional de Río Negro, Argentina.
    • Ñorquín Department
Darío G. Lazo, Leticia Luci. Revision of Valanginian Steinmanellinae bivalves from the Neuquén
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
    • Pehuenches Department
Montagna, A. O., Ponce, J. J. y Buhler, M. (2014). Geología de la cuenca Neuquina y sus sistemas petroleros. Guía Práctica. Fundación YPF-Universidad Nacional de Río Negro, Argentina.
Montagna, A. O., Ponce, J. J. y Buhler, M. (2014). Geología de la cuenca Neuquina y sus sistemas petroleros. Guía Práctica. Fundación YPF-Universidad Nacional de Río Negro, Argentina.
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
Montagna, A. O., Ponce, J. J. y Buhler, M. (2014). Geología de la cuenca Neuquina y sus sistemas petroleros. Guía Práctica. Fundación YPF-Universidad Nacional de Río Negro, Argentina.
Montagna, A. O., Ponce, J. J. y Buhler, M. (2014). Geología de la cuenca Neuquina y sus sistemas petroleros. Guía Práctica. Fundación YPF-Universidad Nacional de Río Negro, Argentina.
Silvia Barredo (1), Norberto Gabriele (2), Alberto Garrido (3) y Gabriel Redonte (4). "Los principales sistemas de cavernas cársticas de la provincia del Neuquén".(1) Instituto Tecnológico de Buenos Aires (ITBA), Instituto del Gas y Petróleo (UBA). Grupo Espeleológico Argentino (GEA). E-mail: sbarredo@itba.edu.ar (2) Universidad Nacional del Centro, Facultad de Ciencias Exactas. Centro de Montaña Tandil (CMT) Municipalidad de Tandil. E-mail: gabriele@exa.unicen.edu.ar (3) Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher" - Dirección Provincial de Minería. Zapala, Neuquén. E-mail: algene@copelnet.com.ar (4) Grupo Espeleológico Argentino (GEA). E-mail: gabriel.redonte@gea.org.ar
Montagne, A. O., Ponce, J. J. y Buhler, M. (2014). Geología de la cuenca Neuquina y sus sistemas petroleros. Fundación YPF-Universidad Nacional de Río Negro, Argentina.
  • Río Negro
American Mineralogist (1978) 63, 1175-1181
  • Salta
    • La Poma Department
A. G. Quiroga y T. Ruíz (1994). Mimetesita, Pb5[Cl(AsO4)3] de la mina Diana, dpto. La Poma, provincia de Salta, Argentina. 2da Reunión de Mineralogía y Metalogenia. Instituto Nacional de Recursos Mineros, UNLP. Publicación 3:325-335.
  • San Juan
    • Valle Fértil Department
Raúl J. Tauber Larry
  • San Luis
    • Coronel Pringles Department
      • Totoral pegmatitic field
        • La Florida
          • San Luis Mine
Černý, P., Galliski, M. A., Oyarzábal, J. C., Teertstra, D. K., Chapman, R., MacBride, L., & Ferreira, K. (2003). Stranded and equilibrated assemblages of late feldspars in two granitic pegmatites in the Pampean Ranges, Argentina. The Canadian Mineralogist, 41(4), 1013-1026.
  • Santa Cruz
    • Deseado Department
Raúl Jorge Tauber Larry
Aliotta, G., Garrido, M., Gómez, C y Luna, L. 1996. Estudio de zeolitas de la zona de “Madre e Hija” (Santa Cruz). 3ª Reunión de Mineralogía y Metalogenia. Instituto de Recursos Minerales, UNLP. Publicación 5: 9-16.
    • Macizo del Deseado
DEL BLANCO, Miguel et al. Characteristicsof a shallow epithermal mineralization in the Deseado Massif, Patagonia. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 373-382.
  • Santiago del Estero
LEAL, P.R.; CORTONA, O. y PAGAN, F.J.. Vetas de cuarzo en el sur de Santiago del Estero. Rev. Asoc. Geol. Argent. [online]. 2005, vol.60, n.2, pp. 389-401
LEAL, P.R.; CORTONA, O. y PAGAN, F.J.. Vetas de cuarzo en el sur de Santiago del Estero. Rev. Asoc. Geol. Argent. [online]. 2005, vol.60, n.2, pp. 389-401
LEAL, P.R.; CORTONA, O. y PAGAN, F.J.. Vetas de cuarzo en el sur de Santiago del Estero. Rev. Asoc. Geol. Argent. [online]. 2005, vol.60, n.2, pp. 389-401
LEAL, P.R.; CORTONA, O. y PAGAN, F.J.. Vetas de cuarzo en el sur de Santiago del Estero. Rev. Asoc. Geol. Argent. [online]. 2005, vol.60, n.2, pp. 389-401
Raúl Jorge Tauber Larry; Hugo A. Peña (1970): Minerales y rocas de aplicación de la Provincia de Tucumán. Secretaría de Estado de Comercio, Industria y Minería. Dirección Provincial de Minas. Tucumán. República Argentina.
Sub secretaría de Minerái de la Nación (1974). Reporte técnico. Argentina.
    • Graneros Department
      • Cerro Quico
Raúl Jorge Tauber Larry
[var: Wood Opal] Raúl Jorge Tauber Larry
      • Amaicha del Valle District
[var: Wood Opal] Raúl Jorge Tauber Larry
[var: Wood Opal] Raúl Jorge Tauber Larry
Atlantic Ocean
 
  • Mid-Atlantic Ridge complex
    • Sierra Leone fracture zone
      • Markov Deep
Sharkov, E.V., Abramov, S.S., Simonov, V.A., Krinov, D.I., Skolotnev, S.G., Bel’tenev, V.E., and Bortnikov, N.S. (2007): Geology of Ore Deposits 49(6), 467-486.
S. M. Sudarikov and S. V. Galkin Geochemistry of the Snake Pit vent field and its implications for vent and non-vent fauna Geological Society, London, Special Publications 1995, 87:319-327
    • Trans-Atlantic Geotraverse hydrothermal field (TAG)
Petersen, S., Herzig, P.M., and Hannington, M.D. (2000): Mineralium Deposita 35, 233-259.
Australia
 
  • New South Wales
    • Bathurst Co.
      • Carcoar
Liversidge 1887, Minerals of New South Wales
    • Beresford Co.
      • Snowy Mts district
    • Buccleuch Co.
      • Coolac district
[var: Opal-AN] Minerals in podiform chromitites - Tumut Serpentinite Province, Southern New South Wales, Graham, Franklin and Marshall, 2001, Australian Journal of Mineralogy 7(1).
    • Cumberland Co.
      • Prospect (Prospect Hill)
Tschernich, R. (1992): Zeolites of the World, P.48; Min Rec (1994) 25:185-194
    • Finch Co.
      • Collarenebri
      • Cumborah
[Clark, 1993 - "Hey's Mineral Index"]
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
- Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
- Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
- Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville. - Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
aracic
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
aracic
Aracic, Stephen (1999), Rediscover Opals in Australia, published 1999 by the Kingswood Press.
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
aracic
- Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram. - Australian Opal Centre web site http://www.australianopalcentre.com/
aracic
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.; Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
Smith, E. & R. (1999): Black Opal Fossils of Lightning Ridge - Treasures from the Rainbow Billabong, Kangaroo Press, East Roseville.
aracic
      • Wyoming Station
aracic
    • Georgiana Co.
    • Macquarie Co.
      • Port Macquarie
    • Murchison Co.
      • Mehi
aracic
    • Narran Co.
      • Angledool
Refs. Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
    • Pottinger Co.
[var: Opal-AN] Specimen in collection
    • Rous Co.
    • St Vincent Co.
      • Ulladulla
    • Wentworth Co.
      • Wentworth
        • Kulcurna Station
        • Nampoo Station
    • Yancowinna Co.
No reference listed
[var: Opal-AN] Australian Min. 3:1 (1997)
      • Broken Hill District
        • Northern Section
[var: Opal-AN] The Daydream Mine, G.D. Grose, Bungala Press 2002. The reference refers to minerals collected at the mine and identified by John Leach.
    • Yungnulgra Co.
      • Gemville
aracic
No reference listed
  • Northern Territory
    • Central Desert Region
[Precious Opal var: Boulder Opal]
    • Barcoo Shire
Natural History Museum, London
http://en.wikipedia.org/wiki/Jundah,_Queensland
http://en.wikipedia.org/wiki/Jundah,_Queensland
    • Bulloo Shire
      • McKinley Co.
        • Bulloo River
          • Blackwater Creek
[Precious Opal] Rocks & Min.: 8:15.
        • Listowel Downs
[Precious Opal] Rocks & Min.:8:4.
    • Burke Shire
      • Burketown
[var: Opal-AN]
    • Gold Coast City Shire
      • Coolangatta
Hall, P. (1988) Australian Mineralogist, Vol 3, April-June 1988, pg. 65.
    • Mount Isa - Cloncurry area
      • Cloncurry District
[var: Opal-AN] Graham Lee Collection
      • Gunpowder District
        • Mount Gordon
Richardson, S.M. and Day, A.D. (1997) Geology of the Esperanza copper deposit. Proceedings of the 3rd International Mining Geology Conference, Launceston. pg. 51-56
      • Mary Kathleen district
[var: Opal-AN] Personal collection and shown on photo
    • Paroo Shire
    • Quilpie Shire
      • Kyabra Co.
        • Keeroongooloo
Rocks & Min.:8:15.
[Precious Opal var: Boulder Opal]
[Precious Opal] Martins da Pedra collection
    • Sunshine Coast Region
    • Western Downs Region
      • Dalby
[var: Opal-AN]
      • Wambo Shire
        • Kaimkillenbun
[var: Opal-AN]
    • Winton Shire
Rob Lavinsky specimen
  • South Australia
    • Central North
No reference listed
Barnes, L.C., (1992), Opal: South Australia's gemstone, Dept. of Mines and Energy, Geological Survey of South Australia, [Parkside, S. Aust.].
Barnes, L.C., (1992), Opal: South Australia's gemstone, Dept. of Mines and Energy, Geological Survey of South Australia, [Parkside, S. Aust.].
      • Stuart Creek
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
[var: Opal-AN] Minerals of Iron Monarch, Glyn L. Francis
Ben Grguric
    • Flinders Ranges
      • North Flinders Ranges
[var: Opal-AN] Steve Sorrell Collection; Steve Sorrell Collection
[var: Opal-AN]
          • Mt Painter area
[var: Opal-AN] 2003, Brugger, J., Ansermet, S. & Pring, A. ' Uranium minerals from Mt Painter, Northern Flinders ranges, South Australia' Australian Journal of Mineralogy, vol. 9, n°1, pp 15-31
        • Vulkathunha - Gammon Ranges National Park
[var: Opal-AN] Pers. Comm. M. Willoughby. Found on specimen with Olivenite. Collection of M. Willoughby.
    • Mt Lofty Ranges
      • North Mt Lofty Ranges
        • Barossa Valley
          • Angaston
Gee, L.C.E. & Brown, H.Y.L., (1908), Record of The Mines of South Australia, 4th ed., Government Printer, Adelaide, South Australia.
Record of Mines - Mine Summary Card No:13, SI5409
        • Burra
No reference listed
        • Spalding
[var: Opal-AN] Personal collection of M. Willoughby.
      • South Mt Lofty Ranges (Adelaide Hills)
    • North West Province
      • Mintabie district
    • Northeast
    • Olary Province
      • Boolcoomatta Reserve (Boolcoomata Station; Boolcoomatta)
[var: Opal-AN] No reference listed
      • Mt Victor Plumbago Station
[var: Opal-AN] J Bosworth, Minsoc SA 1993 Excursion Report
    • Stuart Shelf
      • Andamooka Ranges
see picture
No reference listed
  • Tasmania
    • Avoca-Royal George district
[var: Opal-AN] Mathew Latham collection
    • Devonport district
[var: Opal-AN] http://www.crocoite.com/locationbulletins/part1/zeolites.pdf
    • Hobart
      • Mt Nelson
Bottrill and Baker, 2008, Catalogue of Minerals of Tasmania
      • Risdon
    • Huon district
No reference listed
      • Weld river
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
    • Marrawah district
      • Redpa
http://www.crocoite.com/locationbulletins/part1/zeolites.pdf
    • Southern Islands
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
    • Waratah district
      • Waratah
Bottrill, unpub.
  • Victoria
    • Ballarat
[var: Opal-AN] Steve Sorrell Collection
[var: Opal-AN] Toby Billing collection
    • Benambra
      • Morass Creek gorge
[var: Opal-AN] Steve Sorrell collection
    • Berwick
    • Campaspe Shire
      • Corop
[var: Opal-AN] crocoite.com
    • City of Greater Geelong
      • Anakie
[var: Opal-AN] Museum Victoria Mineralogy Collection
[var: Opal-AN] Museum Victoria Mineralogy Collection
    • Corangamite Shire
      • Skipton
        • Mt. Widderin (Anderson's Hill)
Webb, J. A., Joyce, E. B., & Stevens, N. C. (1982). Lava caves of Australia. In Proceedings of the Third International Symposium on Vulcanospeleology. International Speleological Foundation, Seattle. p74-85.
    • Greater Melbourne Region
      • City of Whittlesea
        • Bundoora
[var: Opal-AN]
      • City of Yarra
        • Collingwood
          • Clifton Hill
[var: Opal-AN] - Birch, W. D., ed. (1989): Zeolites of Victoria. The Mineralogical Society of Victoria Inc., Special Publication No. 2, Melbourne, Australia, pp. 1-30,92,93,97 & 99
    • Latrobe City
      • Yinnar
    • Lilydale
[var: Opal-AN] Steve Sorrell Collection
Alan Goldstein colln.
[var: Opal-AN] specimen in collection
[var: Opal-AN] ex Joan Lamond Collection
    • Mansfield
[var: Opal-AN] W.D.Birch & D.A.Henry 1993. Phosphate Minerals of Victoria. The Mineralogical Society of Victoria special publication No. 3 pp 67-77
    • Pyrenees Shire
      • Avoca
        • Lillicur
    • Rural City of Wangaratta
[var: Opal-AN] Steve Sorrell Collection
      • Greta South
[var: Opal-AN] W. D. Birch and D. A. Henry in Phosphate Minerals of Victoria, p.83-90.
    • Southern Grampians Shire
[var: Opal-AN] Jon Mommers collection
[var: Opal-AN] Judy Rowe Collection
[var: Opal-AN] Judy Rowe Collection
    • Swan Hill Rural City
      • Lake Boga
[var: Opal-AN] Steve Sorrell Collection W.D.Birch 1977. Minerals in the pegmatitic phase of the Lake Boga Granite. The Australian Mineralogist No. 10 June/July 1977, pp. 44-46
[var: Opal-AN] Steve Sorrell Collection
[var: Opal-AN] J.D.Hollis. 1979. Some little known zeolite localities in central Victoria. The Australian Mineralogist No.21 April 1979, pp. 101-102
  • Western Australia
    • Coolgardie Shire
      • Binneringie Station
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
      • Coolgardie
No reference listed
[var: Diatomite] Geology of the Northern Perth Basin, Western Australia- a field guide; A.J. Mory, D.W. Haig, S. Mcloughlin, R.M. Hockisly; Department of Industry and Resources; Perth 2005
      • Cervantes
[var: Diatomite] Geology of the Northern Perth Basin- a field guide; A.J. Mory, D.W. Haig, S. McLoughlin, R.M. Hocking; Dept of Industry and Resources, Western Australian Government; Perth 2005; p51
    • Dundas Shire
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V., (2013): Gemstones of WA, Geological Survey of WA
    • East Pilbara Shire
[var: Opal-AN] J M Bennett Collection
    • Gingin Shire
On Gearkstite at Gingin, Western Australia: Mineralogical Magazine, Vol 19, May 1920, pp23-39
    • Goomalling Shire
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
    • Kalgoorlie-Boulder Shire
      • Bulong
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V. (2013): Gemstones of WA, Geological Survey of WA
      • Cowarna Downs Station
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of Western Australia, Geological Survey of Western Australia
      • Ora Banda
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
    • Meekatharra Shire
      • Milgun Station
Peter Downes, WA Museum
      • Mount Gould Station
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V(2013): Gemstones of WA, Geological Survey of WA
      • Sylvania Station
Grguric, B.A., Jones, S., Gray, S. (in press) Chromian clinochlore from Coobina, Pilbara Province, Western Australia. Australian Journal of Mineralogy.
    • Murchison Shire
      • Byro Station
Fetherston, J., Stocklmater, S., Stocklmayer, V(2013): Gemstones of WA, Geological Survey of WA
Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
      • Nookawarra Station
[var: Common Opal] Fetherston, J, Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
    • Northam Shire
      • Northam
[var: Opal-AN] Fetherston, J., Stocklmayer, S., Stocklmayer, V(2013): Gemstones of WA, Geological Survey of WA
    • Perenjori Shire
      • Karara Conservation Reserve
[var: Opal-AN] Pegmatites of Western Australia; M.I. Jacobson, M.A. Calderwood, B.A. Grguric; Hesperian Press, Perth, 2007
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V(2013): Gemstones of WA, Geological Survey of WA
      • Weelhamby Lake
[var: Common Opal] Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
Simpson (1931-1932) Journal of the Royal Soceity of Western Australia: 18: 69; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 936.
    • Upper Gascoyne Shire
[var: Opaline] Moolooite, a Naturally Occurring Hydrated Copper Oxalate; R.M. Clarke and I.R. Williams; Mineralogical Magazine, June 1986, Vol 50, pp 295-298
      • Mount Phillip Station (Mount Phillips Station)
Kim Macdonald
      • Yinnietharra (Yinnietharra Station; Yinnetharra)
        • Tomkap tourmaline mines (Soklich)
Bridge, P. J. , Daniels, J. L. & Pryce, M. W. (1977): The dravite crystal bonanza of Yinnietharra, Western Australia. Mineralogical Record 8 (2): 109-111
Fetherston, J.M., Stocklmayer, S., Stocklmayer, V.C.(2013): Gemstones of Western Australia- mineral resources bulletin 25, Geological Survey of Western Australia (2013): 57
    • Westonia Shire
      • Westonia
Simpson, E.S., (1948) Minerals of Western Australia. Volume 1-3. Government Printer, Perth.
    • Yalgoo Shire
      • Paynes Find
[var: Opal-AN] Pegamtites of Western Australia; M Jacobson, M Calderwood, B Grguric; Hesperian Press, Perth, 2007.
Austria
 
  • Burgenland
    • Oberpullendorf
      • Kobersdorf
        • Pauliberg
[var: Opal-AN] U. Kolitsch, W. Postl, H.-P. Bojar and W. Trattner (2009): Die Mineralvorkommen im Basalt des Pauliberges. In: Autorenkollektiv (Red. M. A. Götzinger und P. Huber) (2009): Die Mineralien des Burgenlandes - Geologie, Mineralogie und mineralische Rohstoffe. – Wissenschaftliche Arbeiten aus dem Burgenland, Band 126, Amt der Burgenländischen Landesregierung, Abteilung 7 - Landesmuseum, Eisenstadt, 83-99.
    • Oberwart
      • Badersdorf
[var: Opal-AN] Natural History Museum Vienna collection; Götzinger, M. A. & Huber, P. (2009);
[var: Opal-AN] Tuma, F. (1991)
      • Bernstein
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Kümel, F. (1957)
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Hüttenberger Erzberg
H. Meixner: Der Karinthin 9:184-189 (1950)
    • Gurktaler Alpen
      • Flattnitz
[var: Opal-AN] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
      • Radenthein
        • Millstätter Alpe
Pichler (2009)
    • Klagenfurt
      • Ehrentaler Berg
F. Brandstätter: Carinthia II 184./104.:248-252 (1994)
      • Kreuzbergl massif
        • Falkenberg
[var: Opal-AN] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    • Koralpe
      • Großer Speikkogel - Steinschneider area
G. Weissensteiner: Der Karinthin 63:183-186 (1970)
      • Kamp
        • Fraßgraben
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
      • Moschkogel - Weinebene area
        • Brandrücken
[var: Opal-AN]
    • Millstatt lake ridge
      • Fresach
        • Laas
[var: Opal-AN] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    • Saualpe
      • Bad St Leonhard
        • Mica Mines
[var: Opal-AN] F.Walter (1984)
    • St Paul im Lavanttal
      • Kollnitz
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    • Villach
      • Zauchen
H. Meixner: Carinthia II 171./91.:35-36 (1981)
  • Lower Austria
    • Mostviertel
      • Karlstetten
HAMMER & ĆORIĆ (2007): 1501) Chalcedon von Obermamau nördlich von St. Pölten, Niederösterreich. Pp. 171-173 in NIEDERMAYR et al. (2007): Neue Mineralfunde aus Österreich Austria LVI. – Carinthia II, 197./117.: 149-190. (in German)
    • Waldviertel
      • Brunn an der Wild
        • Atzelsdorf
Pristacz, H., jun., Kolitsch, U., Löffler, E., Knobloch, G., Prayer, A. & Thinschmidt, A. (2011): 1696) Calcit, Natrojarosit, Palygorskit, Pyrit, Siderit und andere Mineralien aus dem Marmorbruch Atzelsdorf, Brunn an der Wild, Waldviertel. Pp. 160-161 in Niedermayr, G. et al. (2011): Neue Mineralfunde aus Österreich LX. Carinthia II, 201./121., 135-186.
        • Dietmannsdorf an der Wild
Kugler, A. (1995): Waldviertel Aktuell: Dietmannsdorf. MEFOS Nr. 10, 4.
      • Dobersberg
Huber, S., Huber, P. (1977): Mineralfundstellen. Band 8: Oberösterreich, Niederösterreich und Burgenland. - 271 p., München - Innsbruck (Christian Weise, Pinguin).
      • Drosendorf-Zissersdorf
        • Pingendorf
Niedermayr, G. (1990): Eine bemerkenswerte Zeolithparagenese aus einem Serpentinitsteinbruch bei Pingendorf in Niederösterreich. Mineralien-Welt, 1 (2), 31-34.
NIEDERMAYR, G., B. MOSER, W. POSTL & F. WALTER (1986): Neue Mineralfunde aus Österreich XXXV. Carinthia II, 176./96., 521-547.;
Albert Prayer collection
      • Gars am Kamp
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • Geras
        • Kottaun
[var: Opal-AN] Kolitsch, U., Knobloch, G., Schillhammer, H. & Löffler, E. (2013): 1814) Aikinit, Albit, Amphibol, Andradit, Azurit, Chalkopyrit, Epidot, Hedenbergit, Hyalith, Magnetit, Malachit, Scheelit, Titanit und Quarz aus einem neuen, kleinen Steinbruch nördlich Kottaun bei Geras, Waldviertel, Niederösterreich. Pp. 127-128 in Niedermayr, G. et al. (2013): Neue Mineralfunde aus Österreich LXII. Carinthia II, 203./123., 91-146.
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • Maissau
        • Limberg
[var: Diatomite] Götzinger, M. A., Beran, A. & Libowitzky, E. (1994): Exkursion A: Mineralvorkommen und Lagerstätten im östlichen Waldviertel. Mitt. Österr. Mineral. Ges. 139, 389-405.
        • Oberdürnbach
[var: Diatomite] Götzinger, M. A., Beran, A. & Libowitzky, E. (1994): Exkursion A: Mineralvorkommen und Lagerstätten im östlichen Waldviertel. Mitt. Österr. Mineral. Ges. 139, 389-405.
      • Maria Laach am Jauerling
        • Zintring
[var: Opal-AN] Harald Schillhammer collection
      • Mühldorf
[var: Opal-AN] peter neschen collection
[var: Opal-AN] peter neschen collection;
          • marble quarry (Thalinger quarry; Hausbruch)
[var: Opal-AN] peter neschen collection
[var: Milk Opal] Natural History Museum Vienna collection
      • Persenbeug-Gottsdorf
        • Loja
Löffler, E. & Kolitsch, U. (2011): Die Mineralien der Loja bei Persenbeug, Niederösterreich(I). Mineralien-Welt. 22 (3): 73-84
      • Raabs an der Thaya
        • Eibenstein an der Thaya
[var: Opal-AN] Harald Schillhammer collection
[var: Opal-AN] Kolitsch, U. & Schillhammer, H. (2014): 1881) Amphibol, Apatit, Chabasit, Chlorit, Diopsid, Epidot, Granat, Hamatit, Hyalith, Ilmenit, Limonit, Magnetit, Mikroklin, Pyrit, Quarz, Rutil und Titanit vom Gimpelfeld bei Raabs, Waldviertel, Niederösterreich. P. 116 in Niedermayr, G. et al. (2014): Neue Mineralfunde aus Österreich LXIII. Carinthia II, 204./124., 65-146.
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • Röhrenbach
        • Winkl
Kolitsch, U., Brandstätter, F., Löffler, E., Knobloch, G., Prayer, A., Pristacz, H., jun. & Thinschmidt, A. (2011): 1697) Die Mineralien der Marmorbrüche bei Winkl, Neupölla, Waldviertel. Pp. 161-163 in Niedermayr, G. et al. (2011): Neue Mineralfunde aus Österreich LX. Carinthia II, 201./121., 135-186.
      • St Leonhard am Hornerwald
        • Dürrenberg (Dürnberg)
[var: Milk Opal] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
peter neschen collection
    • Weinviertel
      • Ravelsbach
        • Parisdorf
[var: Diatomite] ötzinger, M. A., Beran, A. & Libowitzky, E. (1994): Exkursion A: Mineralvorkommen und Lagerstätten im östlichen Waldviertel. Mitt. Österr. Mineral. Ges. 139, 389-405.
  • Salzburg
    • Hohe Tauern
      • Felben valley
        • Scheelite deposit
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
      • Gastein valley
        • Bad Gastein
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
        • Böckstein
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
        • Naßfeld valley
          • Kniebeißgraben
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
          • Kreuzkogel massif
            • Radhausberg
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
        • Siglitz - Bockhart area
          • Siglitz - Bockhart Gold Mining District
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
      • Habach Valley
        • Nasenkopf
          • Leckbachgraben (Leckbachrinne)
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs (1989)
      • Obersulzbach valley
        • Hopffeld area
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs (1989)
      • Stubach valley
        • Enzingerboden
          • Tauernmoos lake
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
      • Untersulzbach valley
        • Abichl Alp - Beryller area
[var: Opal-AN] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Lungau
      • Schladminger Tauern
        • Lessach valley
          • Lessach
A. Strasser: Die Minerale Salzburgs (1989)
    • St Johann im Pongau
      • Mitterberg District
[var: Opal-AN] A. Strasser: Die Minerale Salzburgs, 1989
  • Styria
    • Bad Gleichenberg
      • Gossendorf
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • Klause
[var: Opal-AN] Aufschluss 1972(SB), 52-55
      • Wilhelmsdorf
[var: Opal-AN] peter neschen collection
    • Bad Radkersburg
      • Klöch
[var: Opal-AN] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Bruck an der Mur
      • Kapfenberg
        • Tanzenberg
Postl, W. et al. (1985)
      • Laming valley
        • Oberdorf an der Laming
          • Magnesite deposit
Gerald Gesselbauer (2010)
Gerald Gesselbauer (2010)
    • Fischbacher Alpen
      • Rettenegg
        • Prinzkogel (Prinzenkogel)
          • Prinzkogel mines
            • Southern District
Jakely, D. et al. (2008)
    • Graz
      • Wildon
        • Weitendorf
[var: Opal-AN] Aufschluss 1972(SB), 76-79
    • Knittelfeld
      • Ingering valley
[var: Forcherite] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Koralpe
      • Deutschlandsberg
        • Glashütten
Natural History Museum Vienna collection
[var: Opal-AN] Weninger, H. (1976): Mineral-Fundstellen Band 5: Steiermark und Kärnten. Chr. Weise Verlag, München, 231 pp.
        • Osterwitz
[var: Opal-AN] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
[var: Opal-AN] Koritnig, S. ZB1. f. Min. A,1939
      • Eibiswald
        • Sankt Oswald ob Eibiswald
          • Krumbach
[var: Opal-AN] Meixner, H. (1937) : Neue Mineralfunde in den österreichischen Ostalpen. IX. In : Mitteilungen des Naturwissenschaftlichen Vereines für Steiermark, Band 74, 1937
      • Schwanberg
[var: Opal-AN] Aufschluss 1972(SB), 43-47
        • Schwarze Sulm
[var: Opal-AN] Weissensteiner, G. (1975) : Uranmineralien der Koralpe. In : Mineralogie Mitteilungen Band 42,Joanneum, Graz, p.27(283).
    • Leoben
Aufschluss 1972(SB), 80-83
    • Liesing - Palten valley
      • Wald am Schoberpass
Josef Taucher & Christine Elisabeth Hollerer (2012): Chrysokoll und Opal mit Tetraedrit aus dem Steinbruch der Gebrüder Haider nördlich Wald am Schoberpaß, Steiermark. Der Steirische Mineralog 26, 54.
    • Murau
      • Katsch an der Mur
[var: Opal-CT] http://www.markasit070752.ws24.cc/text_62520295_60708465_19667850_deutsch.html
    • Oberhaag
      • Lieschengraben
[var: Opal-AN] peter neschen collection
    • Stubalpe
      • Hochgössnitz
[var: Opal-CT] A.Weiß (1972)
  • Upper Austria
    • Linz-Land
      • Enns
[var: Opal-AN] Peter Neschen Collection
      • Traun
        • Pucking
[var: Opal-AN] Niedermayr, G. (1987): 672. Heulandit und Opal vom Traunkraftwerk Pucking, Oberösterrich. Pp. 306-307 in NIEDERMAYR, G., BRANDSTÄTTER, F., MOSER, B. & POSTL, W. (1987): Neue Mineralfunde aus Österreich XXXVI. Carinthia II, 177./97., 283-329.; R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Mühlviertel
      • Rohrbach
        • Arnreit
[var: Opal-AN] - Josef Schadler, in:(Handschriftliche Aufzeichnungen).
    • Schärding
      • Gopperding
[var: Opal-AN] Kolitsch, U. et al. (2008)
    • Steyr-Land
      • St. Ulrich bei Steyr
[var: Opal-AN] Peter Neschen Collection
Belgium
 
  • Hainaut Province (Henegouwen; Hennegau)
    • Strépy-Bracquegnies
[var: Opal-AG] Les minéraux de Belgique - Page 267 books.google.be/books?id=PncLAQAAIAAJ Joseph Mélon, ‎Pol Bourguignon, ‎André Mathieu Fransolet - 1976 - ‎Extraits -
Bolivia
 
  • La Paz Department
    • Inquisivi Province
      • Caracoles district
Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
    • Loayza Province
      • Sapahaqui
        • Caracato
[var: Opal-AN] Ahlfeld, F. & Muñoz-Reyes, J. (1955) Las Especies Minerales de Bolivia
    • Pacajes Province
      • Berenguela District
USGS Bulletin # 1975, p. 247.
    • Sicasica Province
[var: Diatomite] Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
  • Oruro Department
    • Carangas Province
      • Todos Santos District
USGS Bulletin # 1975, p. 248.
    • Cercado Province
      • Oruro city
USGS Bulletin # 1975, p. 269.
    • Dalence Province
      • Huanuni
Federico Ahlfeld and Alejandro Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia, Boletín No. 5 (Especial), page 170 (Ministerio de Minas y Petroleo, La Paz)
[MinRec 32:472]
Ahlfeld, F. & Schneider-Scherbina, A. (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia.
    • Poopó Province
[var: Diatomite] Salomon Rivas y Federico Ahlfeld (1998) Los Minerales de Bolivia y sus Parajes. (Santa Cruz)
  • Potosí Department
    • Antonio Quijarro Province
      • Tomave
[var: Opal-AN] Salomon Rivas y Federico Ahlfeld (1998) Los Minerales de Bolivia y sus Parajes. p. 535 (Santa Cruz)
    • Chayanta Province
      • Macha area
[var: Opal-AN] Federico Ahlfeld and Jorge Muñoz Reyes (1955) Las Especies Minerales de Bolivia. (Banco Minero de Bolivia, 180 pp)
[var: Opal-AN] Federico Ahlfeld and Jorge Muñoz Reyes (1955) Las Especies Minerales de Bolivia. (Banco Minero de Bolivia, 180 pp)
    • Cornelio Saavedra Province
      • Machacamarca District (Colavi District)
Ahlfeld & Munoz Reyes (1955): Las Especies Minerales de Bolivia
    • Daniel Campos Province
      • San Pablo de Napa
[var: Opal-AN] Alfredo Petrov collection
www.mineralmundi.com
    • Nor Lípez Province
www.mineralmundi.com (in the sulphur deposits)
    • Rafael Bustillo Province (Bustillos Province)
      • Llallagua
Hyrsl, J. & A. Petrov (2006): Famous Mineral Localities: Llallagua, Bolivia. Mineralogical Record. 37: 117-162
[MinRec 32:481]
    • Sud Lípez Province
[var: Diatomite] USGS Bulletin # 1975, p. 258 (1992)
Federico Ahlfeld and Alejandro Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia. (Ministerio de Minas y Petroleo, La Paz)
      • San Antonio de Lípez
Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia (USGS Bulletin no. 1975)
      • San Pablo de Lípez
        • Santa Isabel district
Donald Richter, et al (1992) USGS Bulletin 1975, p.163.
Brazil
 
  • Bahia
    • Boa Nova
Mineralogical Record (1977) 8:382-387
F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
    • Capim Grosso
Dutra, C. V., & Formoso, M. L. L. (2011). Considerações sobre os elementos terras raras em apatitas. Geochimica Brasiliensis, 9(2).
    • Guajeru (Santa Rosa de Condeúba)
[var: Opal-AN] Mineralogical Record (1977) 8:382-387
[var: Wood Opal] Martins da Pedra collection
    • Doce valley
      • Galiléia
        • Laranjeiras
[var: Opal-AN] [MinRec 32:411]
        • Sapucaia do Norte
[var: Opal-AN] Cassedanne, J.P. & Baptista, A. (1999): Famous Mineral Localities: The Sapucaia Pegmatite Minas Gerais, Brazil. Mineralogical Record, 30: 347-360 + 365.
Atencio D, Carvalho F M S, Matioli P A (2004) Coutinhoite, a new thorium uranyl silicate hydrate, from Urucum Mine, Galiléia, Minas Gerais, Brazil. American Mineralogist 89, 721-724
  • Pará
    • São Geraldo do Araguaia
Revista Brasileira de Geociências, vol.30
  • Paraíba
    • Borborema mineral province
      • Salgadinho
        • São José da Batalha
[var: Opal-AN] de Brito Barreto, S., & Bretas Bittar, S. M. (2010). Los depósitos de gemas de Brasil: localización, producción e impacto económico. Boletín de la Sociedad Geológica Mexicana, 62(1), 123-140.
  • Paraná
    • Foz do Iguaçu
Geological Survey Professional Paper 327 (U.S. Department of the Interior, 1959)
  • Piauí
    • Pedro II
de Brito Barreto, S., & Bretas Bittar, S. M. (2010). Los depósitos de gemas de Brasil: localización, producción e impacto económico. Boletín de la Sociedad Geológica Mexicana, 62(1), 123-140.
No reference listed
    • Borborema mineral province
      • Parelhas
[var: Opal-AN] de Brito Barreto, S., & Bretas Bittar, S. M. (2010). Los depósitos de gemas de Brasil: localización, producción e impacto económico. Boletín de la Sociedad Geológica Mexicana, 62(1), 123-140.
  • Rio Grande do Sul
[var: Fire Opal] www.gemstone.org/gem-by-gem/english/fire.html
Strieder, A. J., & Heemann, R. (2006). Structural constraints on Paraná basalt volcanism and their implications on agate geode mineralization (Salto do Jacuí, RS, Brazil). Pesquisas em Geociências. Porto Alegre, RS. Vol. 33, n. 1 (2006), p. 37-50.
  • Rondônia
    • Porto Velho
  • Santa Catarina
[var: Opal-AN] Manfred Bergmann (2009) Lapis, 34, #3, 30-34.
  • São Paulo
    • São Paulo
American Mineralogist 54:966-969
Fosfatos e Silicatos Secundários de Urânio de Perus, São Paulo - Atencio, Daniel and Hypolito, Raphael - Revista Brasileira de Geociências, março de 1994
Bulgaria
 
  • Haskovo Oblast (Khaskovo Oblast)
    • Mineralni Bani Obshtina
[var: Wood Opal] Marcus Voigt Collection
[var: Opal-AN] Marcus Voigt Collection
    • Rhodope Mts
Marchev, P., Downes, H., Thirlwall, M. F., & Moritz, R. (2002). Small-scale variations of 87Sr/86Sr isotope composition of barite in the Madjarovo low-sulphidation epithermal system, SE Bulgaria: implications for sources of Sr, fluid fluxes and pathways of the ore-forming fluids. Mineralium Deposita, 37(6-7), 669-677.
www.clmc.bas.bg/Annreps/ANNREP8/annrep8.htm.
    • Krumovgrad Obshtina
Marchev, P.; Singer, B. S.; Jelev, D.; Hasson, S.; Moritz, R.; Bonev, N. (2004): The Ada Tepe deposit: a sediment-hosted, detachment fault-controlled, low-sulfidation gold deposit in the Eastern Rhodopes, SE Bulgaria. Swiss Bulletin of Mineralogy and Petrology, 84, 2004, 59-78. ; Marinova, I. (2008). Morphology of electrum from Khan Krum gold deposit, Krumovgrad goldfield, Eastern Rhodope Mountain, SE Bulgaria. Geologica Macedonica, 2, 111-120.
http://www.clmc.bas.bg/Annreps/ANNREP8/annrep8.htm
Anton Ivanov field observation
    • Rhodope Mts
http://www.clmc.bas.bg/Annreps/ANNREP8/annrep8.htm
Tschernich, 1992. Zeolites of the World
  • Pazardzhik Oblast (Pazardjik Oblast)
    • Rakitovo Obshtina
Marcus Voigt Collection
  • Sofiya Town Oblast (Grad Sofia Oblast)
    • Sofiya Obshtina (Sofia Obshtina)
I. Kostov, V. Breskovska, J. Mincheva-Stefanova, G. Kirov (1964): Minerals of Bulgaria. Sofia, Bulgaria, 540 pp. (in Bulgarian).
  • Yambol Oblast
    • Tundzha Obshtina
[var: Milk Opal] Marcus Vau Collection
Cambodia
 
  • Kâmpóng Thum Province (Kampong Thom Province)
[var: Opal-AN] Economic and Social Commission for Asia and the Pacific (1993) Atlas of Mineral Resources for the Escap Region Cambodia Vol 10 UN.
Austin, Gordon et al. "World Mining Report". Colored Stone (November–December 2005).
  • Stung Treng Province
    • Khone district
[var: Opal-AN] Economic and Social Commission for Asia and the Pacific (1993) Atlas of Mineral Resources for the Escap Region Cambodia Vol 10 UN.
Canada
 
  • British Columbia
    • Kamloops Mining Division
      • Mt. Savona
        • Deadman's River
Tschernich - Zeolites of the World (1992)
    • Omenica Mining Division
      • Burns Lake
www.em.gov.bc.ca/cf/minfile
      • Troitsa Peak
MINFILE No 093E 120
    • Vernon Mining Division
      • Vernon
www.em.gov.bc.ca/cf/minfile; Simandl, G. J., Hancock, K. D., Callaghan, B., Paradis, S., & Yorke-Hardy, R. (1997). Klinker Precious Opal Deposit, South Central British Columbia, Canada-Field Observations and Potential Deposit-Scale Controls. British Columbia Ministry of Energy and Mines, 321-327.
  • Manitoba
    • Souris
[var: Wood Opal] John Sinkankas (1959) Gemstones of North America: Volume 3; Phillips, K. A. (1978) Minerals of Manitoba: Vol 1 Nonmetallic and pegmatic. Manitoba Mineral Resources Division Educational Series 78/1.
  • Northwest Territories
CanMin 41:117-137
  • Nova Scotia
    • Cumberland Co.
J.N. Wingard.
    • Lunenburg Co.
H. Piers, "The Occurrence of Opal in Granite near New Ross, Lunenburg County, N.S.", Proceedings of the Nova Scotian Institute of Science, vol. 12, pt. 4, 446-449, 1910.
  • Ontario
    • Hastings Co.
      • Dungannon Township
[var: Hyalite] Michael Adamowicz Collection
    • Renfrew Co.
      • Lyndoch Township
www.ontariominerals.com/berylpit.htm
  • Québec
    • Abitibi-Témiscamingue
      • Témiscamingue RCM
        • Les Lacs-du-Témiscamingue
Ansell H G, Roberts A C, Plant A G, Sturman B D (1980) Gittinsite, a new calcium zirconium silicate from the Kipawa agpaitic syenite complex, Quebec, The Canadian Mineralogist 18, 201-203
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
http://membres.lycos.fr/quebecminerals/tripbluequartz.html
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
  • Yukon Territory
    • Dawson Mining District
Sabina, A.P. (1972) Rocks & minerals for the collector: The Alaska Highway, Dawson Creek, British Columbia to Yukon/Alaska border. GSC paper 72-32. Reissued (1992) as GSC Miscellaneous Report 50, 98-99.
Chile
 
  • Antofagasta Region
    • Antofagasta Province
      • Sierra Gorda District
        • Caracoles
R. S. W. Braithwaite et al.: Min. Mag. 68(3):527-539 (2004)
    • El Loa Province
      • Calama
        • Chuquicamata District
R.B. Cook: "Famous mineal locality; Chuquicamata, Chile": Mineralogical Record, sept.-oct. 1973
Rodgers, K. A., Greatrex, R., Hyland, M., Simmons, S. F., & Browne, P. R. L. (2002). A modern, evaporitic occurrence of teruggite, Ca4MgB12As2O28. 18H2O, and nobleite, CaB6O10. 4H2O, from the El Tatio geothermal field, Antofagasta Province, Chile. Mineralogical Magazine, 66(2), 253-259.; TESIS PARA OPTAR AL GRADO DE MAGÍSTER EN CIENCIAS, MENCIÓN GEOLOGÍA MEMORIA PARA OPTAR AL TÍTULO DE GEÓLOGO CONSTANZA BEATRIZ NICOLAU DEL ROURE EYLERTS, 2013
  • Atacama Region
    • Copiapó Province
Sernageomin database 2005;Stgo de Chile
      • Tierra Amarilla
        • Pampa Larga district
Samples analysed by Dr. Tony Kampf, Curator of LAC Mineralogical Museum, USA
Economic Geology; January 2005; v. 100; no. 1; p. 131-148
  • Coquimbo Region
    • Elqui Province
      • El Indio deposit
Jannas R./Araneda R.; "Geología de la veta Indio Sur; una estructura tipo Bonanza del yacimiento El Indio"; Revista Geológica Chilena, 1985, Stgo de Chile.
China
 
  • Anhui Province
    • Anqing Prefecture
      • Huaining Co.
Wenya Zhou and Deming Xu (1990): Acta Petrologica et Mineralogica 9(1), 69-77
    • Chizhou Prefecture
      • Qingyang Co.
Yuanming Pan and Ping Dong (1999): Ore Geology Reviews 15, 177-242.
    • Chuzhou Prefecture
      • Quanjiao Co.
Pan Fang, Fahui Pan, and Qichai He (1981): Acta Mineralogica Sinica 3(1), 73-77; Wenguang Li (1997): Jilin Geology 16(4), 22-25; Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
    • Wuhu Prefecture
      • Nanling Co.
Chunhua Wen, Wenyi Xu, Hong Zhong, Qingtian Lü, Zhusen Yang, Shihong Tian, and Yingchao Liu (2011): Mineral Deposits 30(3), 533-546
    • Xuancheng Prefecture
      • Jixi Co.
[var: Hyalite] National Geological Archives of China database, record no. X00038564
  • Chongqing Municipality
    • Chengkou Co.
Gongqin Zhang (1986): Geology and Prospecting 22(7), 10-16
  • Fujian Province
    • Longyan Prefecture
      • Liancheng Co.
        • Liancheng Mn deposit
Nanlai Zheng, Xingli Mao, and Jiansheng Ding (1986): Geology and Prospecting 22(3), 17-20; Huacai Chen (1989): Geology and Prospecting 25(10), 6-11
      • Shanghang Co.
        • Zijinshan ore field
http://pubs.usgs.gov/of/2005/1060/PorCu.txt
    • Ningde Prefecture
      • Zhouning Co.
Yachui Jiang, Henian Chen, Cuanhuai Wu, and Shizhong Chen (1994): Geology and Prospecting 30(4), 21-25
    • Zhangzhou Prefecture
      • Yunxiao Co.
        • Tongbei
[var: Opal-AN] C. Lemanski, Jr. and Ottens, B., 2005. Tongbei. Spessartine localities, Fujian Province, China. Mineralogical Record, 36 (1): 35-43
  • Gansu Province
    • Gannan Autonomous Prefecture
      • Diebu Co. (Têwo Co.)
National Geological Archives of China database, record no. X00043161
    • Jiuquan Prefecture
      • Guazhou Co. (Anxi Co.)
Laigeng Yang (1989): Geology and Prospecting 25(6), 9-13
      • Subei Co.
Yuanchao Shen, Ping Shen, Qingdong Zeng, Tiebing Liu, and Guangming Li (2006): Mineral Deposits 25(5), 572-581; Shen Ping, Shen Yuanchao, Liu Tiebing, Li Guangming, and Zeng Qingdong (2008): Mineralium Deposita 43(5), 499-517
  • Guangdong Province
    • Heyuan Prefecture
      • Zijin Co.
Gongsheng Yan (1987): Mineral Deposits 6(1), 45-55
    • Shaoguan Prefecture
      • Nanxiong Co.
Liangshu Shu, Ping Deng, Bin Wang, Zhengzhong Tan, Xinqi Yu, and Yan Sun (2004): Science in China, Series D (Earth Sciences), 47(8), 673-688.
      • Shixing Co.
Liangshu Shu, Ping Deng, Bin Wang, Zhengzhong Tan, Xinqi Yu, and Yan Sun (2004): Science in China, Series D (Earth Sciences), 47(8), 673-688.
      • Wengyuan Co.
Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156.
  • Guangxi Zhuang Autonomous Region
    • Chongzuo Prefecture
      • Daxin Co.
Min, M.-Z., Luo, X.-Z., Mao, S.-L., Zheng, D.-Y., and Shen, B.-P. (2002): Ore Geology Reviews 19(1/2), 79-93.
  • Guizhou Province
    • Qianxi'nan Autonomous Prefecture
      • Qinglong Co.
Yongzhi Zhang and Maorong Zhen (2004): Guizhou Geology 21(2), 99-105
  • Hainan Province (Hainan Island)
    • Changjiang Co.
Hanzhu Wang (1985): Earth Science, Journal of China University of Geosciences 29(2)
  • Hebei Province
    • Handan Prefecture
      • Wu'an Co.
Guilin Xu, Xiaolan Shi, and Hongcai Xu (2006): Geology and Prospecting 42(2), 13-18
    • Qinhuangdao Prefecture
      • Qinglong Co.
http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt
  • Heilongjiang Province (Manchuria; Dongbei Region)
    • Daxing'anling Prefecture
      • Tahe Co.
Xiangwen Li, Yanchen Yang, Songqing Ye, Zhijie Liu, Changlai Shao, and Haifeng Wai (2014): Geology and Exploration 50(1), 77-87
    • Heihe Prefecture
      • Xunke Co.
Zhong Tang, Songqing Ye, and Yanchen Yang (2010): Global Geology 29(3), 400-407
    • Jixi Prefecture
      • Hulin Co.
Yongwei Huang, Guanghui Li, and Dachao Lu (2010): Global Geology 29(2), 226-233
Jianguo Yang, Chuanshun Quan, and Xiuli Liu (2005): Gold Science and Technology 13(5), 26-29
    • Yichun Prefecture
      • Jiayin Co.
        • Wulaga Mine
http://www.portergeo.com.au/database/mineinfo.asp?mineid=mn1061; Guihu Chen, Fuzhou Wang, Yanzhong Wang, Jiguang Xue, Cangjiang Zhang, Yajun Li, and Xiaojun Duan (2012): Gold Science and Technology 20(2), 14-19
  • Henan Province
    • Luoyang Prefecture
      • Luanchuan Co.
        • Nannihu ore field
Jichang Weng, Yunzheng Zhang, Chaoyong Huang, Wenzhi Li, Beilei Cui, and Mingwei Luo (2010): Geology and Exploration 46(1), 41-48
    • Sanmenxia Prefecture
      • Lingbao Co.
Guang Wu, Yuchuan Chen, Zongyan Li, Xinsheng Yang, Jun Liu, and Cuijie Qiao (2013): Mineral Deposits 32(4), 809-822
  • Hunan Province
    • Loudi Prefecture
      • Lengshuijiang Co.
Guozhang Wen, Qiang Wu, Hanyuan Liu, Guozhu Xie, and Xiuliu Lei (1993): Geology and Prospecting 29(7), 20-27
    • Shaoyang Prefecture
      • Shaodong Co.
Ziqiang Wei (1976): Geology and Prospecting 12(8), 25-29
Hunan 230 Laboratory, Hunan 305 Geological Team, Wuhan Geological Institution X-ray Laboratory (1976): Acta Geologica Sinica 50(2), 203-204.
    • Xiangtan Prefecture
      • Yuhu District
Ziqiang Wei (1976): Geology and Prospecting 12(8), 25-29
    • Yiyang Prefecture
      • Heshan District
Ziqiang Wei (1976): Geology and Prospecting 12(8), 25-29
  • Inner Mongolia Autonomous Region
    • Alxa League (Alashan Prefecture)
      • Ejin Banner (Ejina Co.)
Dianhao Huang and Baolin Wang (1997): Journal of Precious Metallic Geology 6(2), 93-100
    • Baotou League (Baotou Prefecture)
      • Bayan Obo Mining District
        • Bayan Obo
Qingchang Meng (1981): Geology and Prospecting 17(3), 10-17
    • Bayan Nur League (Bayannao'er Prefecture)
      • Urad Rear Banner (Wulate Houqi)
Zhaolong Li, Wendou Xu, Yijie Xi, and Xinming Jiang (1981): Geology and Prospecting 17(6), 7-14
Zhaolong Li, Wendou Xu, Yijie Xi, and Xinming Jiang (1981): Geology and Prospecting 17(6), 7-14
    • Hinggan League (Xing'an Prefecture)
      • Tuquan Co.
Lingan Bai, Jinggui Sun, Qinglong Sun, Alei Gu, Keqiang Zhao, and Lanjing Men (2012): Mineral Deposits 31(6), 1249-1258
    • Hulunbuir League (Hulunbei'er Prefecture)
      • Old Barag Banner (Chenba'erhu Co.)
Feng Yuan, Degao Zhai, Jiajun Liu, Xiaodong Mao, Jianping Wang, Lidong Liu, Huailing Ma, Shouguang Wang, and Yuxi Li (2012): Geological Bulletin of China 31(6), 954-968
    • Ulaan Chab League (Wulanchabu Prefecture)
      • Siziwang Banner (Siziwang Co.)
Fengjun Nie, Dongqin Xu, Sihong Jiang, and Yan Liu (2008): Mineral Deposits 27(1), 1-13
    • Ulanhad League (Chifeng Prefecture)
      • Bairin Left Banner (Balin Zuoqi)
Tai Zhang and Yunji Liu (2002): Geology of Chemical Minerals 24(1), 39-47
  • Jiangsu Province
    • Huai'an Prefecture
      • Xuyi Co.
Tianhu Chen, Xiaochun Xu, Shucang Yue, and Jinzhong Li (2002): Geology and Prospecting 38(2), 49-54; Tianhu Chen, Huifang Xu, Anhuai Lu, Shuchuan Peng, and Shucang Yue (2004): Science in China, Series D (Earth Sciences), 47(11), 985-1004
Wenguang Li (1997): Jilin Geology 16(4), 22-25; Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
    • Suzhou Prefecture
      • Huqiu District
Kecong Han and Shengyun Ma (1985): Mineral Deposits 4(2), 58-68
  • Jiangxi Province
    • Ganzhou Prefecture
      • Ruijin Co.
Yunhuai Lin (1986): Geology and Prospecting 22(4), 22-28
    • Jiujiang Prefecture
      • Xiushui Co.
        • Xiushui Uranium ore field
Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
  • Jilin Province (Manchuria; Dongbei Region)
    • Baishan Prefecture
      • Fusong Co.
[var: Diatomite] Jie Yao, Honglin Yu, Anping Wang, and Yixing He (2002): Journal of Jilin University (Earth Science Edition) 32(1), 43-50
      • Jiangyuan District (Hunjiang Co.)
Shiyuan Wang, Jizhang Fan, Yajian Liu, and Shan Xu (2007): Geological Bulletin of China 26(7), 909-915
    • Jilin Prefecture
      • Huadian Co.
        • Jiapigou ore field
Bin Kang, Jirong Bo, and Diguang Dong (2000): Geology and Prospecting 36(6), 27-31
    • Yanbian Chaoxianzu Autonomous Prefecture
      • Wangqing Co.
Hai Zhao, Xuewu Chui, and Lunxian Xun (2008): Gold Science and Technology 16(1), 48-51
      • Yanji Co.
Renyi Chen and Zhongyao Rui (1993): Mineral Deposits 12(1)
  • Shandong Province
    • Linyi Prefecture
      • Pingyi Co.
        • Tongshi complex
Changfu Chen, Yanbing Li, and Mingxia Jiang (1999): Geological Science and Technology Information 18(1), 60-66
  • Shanxi Province
    • Shuozhou Prefecture
      • Pinglu District
Yongtao Zhang and Guiqin Tang (1986): Mineral Deposits 5(1), 63-72
  • Sichuan Province
    • Ngawa Autonomous Prefecture (Aba Autonomous Prefecture)
      • Zoigê Co. (Ruo'ergai Co.)
[var: Geyserite] Su Sun (1993): Gold Science and Technology 1(2), 4-10
http://www.cicresources.com/PDF_REPORTS/Pingding_F1ReportFinal.pdf
  • Tibet Autonomous Region
    • Lhasa Prefecture
      • Damxung Co. (Dangxiong Co.)
Xiangang Meng, Zhaogang Shao, Chaobin Yang, Weizhi Lei, Jin Wang, Xiangyang Feng, Dagang Zhu, Jia Yu, Jianjun Du, and Jian'en Han (2004): Geological Bulletin of China 23(4), 381-389
    • Nagchu Prefecture (Naqu Prefecture)
      • Amdo Co. (Anduo Co.)
Shenghao Yan, Jinjie Yu, Yixin Zhao, Zhizhong Xu, Anjian Wang, and Dengkui Su (2003): Mineral Deposits 22(2), 149-157; Jianjun Bu and Qifa Duan (2006): Geological Bulletin of China 25(1/2), 273-276
    • Xigazê Prefecture (Rikaze Prefecture; Shigatse Prefecture)
      • Ngamring Co. (Angren Co.)
[var: Geyserite] Yuanyi Zhao, Fengjun Nie, Zengqian Hou, Zhenqing Li, Xitao Zhao, and Zhibang Ma (2006): Mineral Deposits [Kuangchuang Dizhi] 25(3), 281-291
      • Xaitongmoin Co. (Xietongmen Co.)
Xinghai Lang, Juxing Tang, Zhijun Li, Yong Huang, Yuan Chen, and Li Zhang (2011): Mineral Deposits 30(2), 327-338
  • Xinjiang Autonomous Region
    • Tulufan Prefecture (Turfan Prefecture; Turpan Prefecture)
      • Shanshan Co. (Piqan Co.; Pichan Co.)
Lianchang Zhang, Wenjiao Xiao, Kezhang Qin, Jinsheng Ji, and Xingke Yang (2004): International Journal of Earth Sciences 93, 224-240.
    • Wulumuqi Prefecture (Ürümqi Prefecture; Ürümchi Prefecture)
      • Wulumuqi Co. (Ürümqi Co.; Ürümchi Co.)
        • Chaiwobao Cu ore field
Jincao Wang, Jianye Wang, Zhengrun Wang, and Ensheng Peng (2000): Geology and Prospecting 36(5), 24-26
    • Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture)
      • Aletai Prefecture (Altay Prefecture)
        • Jimunay Co. (Jeminay Co.; Jeminey Co.)
          • Eastern Sawur Caldera Complex
Fuquan Yang, Jingwen Mao, Bierlein, F.P., Pirajno, F., Caisheng Zhao, Huishou Ye, and Feng Liu (2009): Ore Geology Reviews 35, 217-234.
      • Xinyuan Co. (Künes Co.)
        • Tu'ergen
[var: Opal-AN] Wuhan Huaze Science & Technology Development Co. Ltd., 2007
  • Yunnan Province
    • Baoshan Prefecture
      • Tengchong Co.
Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
[var: Diatomite] Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
        • Rehai geothermal field
Pin'an Wang (2001): Bulletin of the Geological Survey of Japan 52(8).
        • Tengchong Sn belt
Shilu Zhang (1986): Mineral Deposits 5(3), 19-26
    • Chuxiong Autonomous Prefecture
      • Chuxiong Co.
Yunman Zhou, Jingwen Mao, and Changqing Zhang (2009): Geology and Exploration 45(5), 588-594; Yunman Zhou, Changqing Zhang, Shuqiong Wang, and Xiuping Qin (2012): Mineral Deposits 31(1), 52-64
    • Dehong Autonomous Prefecture
      • Lianghe Co.
        • Tengchong Sn belt
Shilu Zhang (1986): Mineral Deposits 5(3), 19-26
      • Luxi Co.
http://www.spartonres.ca/download/Luxi-Sedar(02-02).pdf
    • Pu'er Prefecture
      • Mojiang Co.
Guangjun Yu and Ruyong Xie (1986): Geology and Prospecting 22(2), 11-18; Yuan Li (1998): Geology and Prospecting 34(5), 28-32
    • Qujing Prefecture
      • Huize Co.
        • Huize Zn-Pb-(Ag) ore field
Senning Tang (1984): Geology and Prospecting 24(12), 1-9
  • Zhejiang Province
    • Jinhua Prefecture
      • Wuyi Co.
Panov, B.S., and Hongquan Yan (1989): Geology and Prospecting 25(10), 1-5
Colombia
 
  • Boyacá Department
    • Guavió-Guatéque Mining District
      • Mun. de Chivor
[var: Opal-AN] Emeralds of the World English extraLapis Vol. 2 2002 pp36-45
[var: Milk Opal] Daniel S Yunis
Costa Rica
 
  • Guanacaste Province
[var: Diatomite] www.mineralmundi.com
[var: Diatomite] www.mineralmundi.com
Cuba
[var: Moss Opal] Mineral Collector 10:118 (1903)
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Benešov (Beneschau)
Kratochvíl, F.: Příspěvek k petrografii českého krystalinika. In Sborník geologického ústavu Československé republiky, 1947, sv. 14, s. 449-536.
Zacek, V., Oplustil, S., Mayova, A. & Meyer, F. R. (1995): Die Mineralien von Kladno in Mittelböhmen, Tschechische Republik. Mineralien-Welt 6 (1), 13-30 (in German).
Pauliš, P.: Nejzajímavější mineralogická naleziště Čech. Kutná Hora: Kuttna, 2000, s. 84-85.
      • Vlašim (Wlaschim)
Zemek, V.: Zlatodůl Roudný u Vlašimi. Pod Blaníkem, 5. samostatná příloha, 2001: Podblanické ekocentrum Českého svazu ochránců přírody a Muzeum okresu Benešov, 108 s.
    • Hradec Králové Region
      • Nová Paka (Neupaka)
http://www.mineralos.cz/lokality/hridele/uhride.htm
    • Karlovy Vary Region
      • Doupov (Duppau)
[var: Opal-AN] No reference listed
      • Horní Slavkov (Schlaggenwald)
        • Krásno (Schönfeld)
          • Čistá
Janečka, J., Just, J., Kušnír, I.: Zpráva o výzkumu a výpočet zásob Sn-rud na ložisku Jeroným v Čisté ve Slavkovském lese (stav ke dni 1.7.1966). Loket: MS, Ústřední ústav geologický Praha, 1966. 86 s.
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
          • Horní Blatná District (Platten)
            • Horní Blatná (Platten; Bergstadt Platten)
Bufka, A., Velebil, D.: Manganová mineralizace žíly Marie Terezie u Horní Blatné v Krušných horách. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2003, roč. 11, s. 100-114.
Lapis 2002(7/8), 63-65
      • Sokolov (Falkenau an der Eger)
Pauliš P. Nejzajímavější mineralogická naleziště Čech II. Kuttna. Kutná Hora 2003. ISBN 80-86406-27-X.
    • Liberec Region
      • Harrachov (Harrachsdorf)
Fengl, M.: Mineralogie těžených fluoritových ložisek (1.-5.). Minerál, 1998-1999, roč. 6-7, č. 2, 4, 6, 1, 3.
      • Kozákov (Kosakow)
Pauliš, P.: Nejzajímavější mineralogická naleziště Čech. Kutná Hora: Kuttna, 2000, s. 57-58.
Scharm, B.: Přehled minerálů nalezených v oblasti uranových koncentrací v severočeské křídě. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 169-172.
    • Pardubice Region
Prachař, I.: Současný stav výskytu nerostů ve Chvaleticích. Acta musei Reginaehradecensis, série A: vědy přírodní, 1981, roč. XVI., s. 99-102.
Pauliš P. Mineralogické lokality okolí Kutné Hory. Kuttna, Kutná Hora 1999. ISBN 80-9027 19-0-1.
    • Plzeň Region
      • Černošín (Tschernoschin)
Navrátil, Z., Šrein, V.: Krystalovaný olivín v tufech Vlčí hory u Černošína. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1997, roč. 4-5, s. 177-178.
      • Klatovy (Klattau)
        • Horažďovice
          • Hejná
Hofmanovi P. a R.: Mineralizace vápencového lomu na vrcholu Radvanka u Hejné. Minerál, 2010, 18, 3, 201-211.
      • Rokycany (Rokitzan; Rokytzan)
Janouš, F.: Minerály z Kněží hory u Těškova (okres Rokycany), Minerál, 1995, roč. 3, č. 6, s. 367-369.
Pauliš, P.: Nejzajímavější mineralogická naleziště Čech II. Kutná Hora: Kuttna, 2003, s. 111-114.
    • South Bohemia Region
      • České Budějovice (Budweis)
No reference listed
Duda, Rejl, Slivka: "Mineralien", 1991; Čech, V., Koutek, J.: Geologické a genetické poměry ložisek železné a niklové rudy u Křemže v jižních Čechách. Sborník St. geol. úst. ČSR, 1946, sv. 13,
      • Písek
[var: Opal-AN] Cícha J., Sejkora J.: Vanadový wavellit, variscit a další fosfáty z grafitických kvarcitů v Čížové u Písku. Minerál, 2011, 19, 1, 23-32.
      • Strakonice
Litochleb, J. et al.: Korund ze skapolitem bohaté vápenatosilikátové horniny v moldanubických mramorech u Krtů na Strakonicku. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1997, roč. 4-5, s. 169-172.
      • Tábor
http://www.mineralos.cz/lokality/chynov/chynov.htm
    • Ústí Region
      • Bílina (Bilin)
Bouška, V., Dvořák, Z.: Nerosty severočeské hěndouhelné pánve. Praha: Severočeské doly, a.s., 160 s.
        • Hořenec (Horzenz)
Filippi, M., Filippi, R.: Hořenec u Bíliny – světová lokalita krystalů aragonitu. Minerál, 2004, roč. 12, č. 3, s. 188-195.
Velebil, D.: Bílina – Hradiště, klasické naleziště „cimolitu“ a „anauxitu“. Minerál, 2005, roč. 13, č. 6, s. 413-419.
      • Chomutov (Komotau)
Řehoř, M., Dvořák, Z.: Nové poznatky o mineralogii lokality Ahníkov. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1997, roč. 4-5, s. 183-185.
      • Děčín (Tetschen)
        • Jílové u Děčína (Ober Eulau)
Fengl, M.: Mineralogie těžených fluoritových ložisek (4.). Minerál, 1999, roč. 7, č. 1, s. 38-53.
      • Duchcov (Dux)
Bouška, V., Dvořák, Z.: Nerosty severočeské hěndouhelné pánve. Praha: Severočeské doly, a.s., 160 s.
      • Kadaň (Kaaden)
        • Tušimice
Bouška, V., Dvořák, Z.: Nerosty severočeské hěndouhelné pánve. Praha: Severočeské doly, a.s., 160 s.
      • Krušné Hory Mts (Erzgebirge)
        • Klášterec nad Ohří
Wiesner, T.: Nová lokalita minerálů zeolitové skupiny u Klášterce nad Ohří. Časopis pro mineralogii a geologii, 1984, roč. 29, č. 4, s. 432.
        • Krupka (Graupen)
Analysed by geology lab Green Gas DPB
      • Most
        • Braňany
Svejkovský J., Dvořák Z.., Řehoř M., Muzikant P.: Zajímavá mineralizace bentonitového lomu v Braňanech u Mostu. Minerál, 2013, 21, 6, 541-547.
Filippi, M.: Korozluky – pozoruhodná mineralogická lokalita Českého středohoří. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2002, roč. 10, s. 320-322.
      • Ústí nad Labem (Aussig)
[var: Hyalite] P.Pauliš
Ulrych, J. et al. (2000): Tertiary phonolite laccolith of Mariánská hora hill, N. Bohemia: geological, petrological and mineralogical characteristics. Acta Montana IRSM AS CR, series A No. 15 (116), p. 5-44.
[var: Opal-AN]
[var: Opal-AN] www.geocities.com/Smula.geo
        • Řehlovice
          • Radejčín (Radzein)
[var: Opal-AN] Radoň M. Významné mineralogické lokality Českého středohoří. Minerál 2009, XVII(2):106-126.
[var: Opal-AN]
  • Moravia (Mähren; Maehren)
    • Olomouc Region
      • Žulová (Friedeberg)
Kruťa, T.: Nerostný výzkum ve Slezsku v letech 1956-1957. Přírodovědecký sborník Ostravského kraje, 1957, 18, 543-571.
    • South Moravia Region
      • Blansko
Dana RICHTEROVÁ, Antonín PŘICHYSTAL and Zdeněk LOSOS, "Moravian Jurassic Geodes and their Geological Significance," GeoLines 13, 2001, p. 106. (http://geolines.gli.cas.cz/fileadmin/volumes/volume13/G13-106.pdf)
      • Brno (Brünn)
Mrázek, I.: Nová nelaziště achátu a opálu u Brna-Černovic. Časopis pro mineralogii a geologii, 1976, roč. 21, č. 1, s. 96.
      • Letovice (Lettowitz)
Ulrych, J.: Stichtit z hadcového tělesa od Slatinky u Letovic. Časopis pro mineralogii a geologii, 1966, roč. 11, č. 3, s. 311-315.
      • Moravský Krumlov
Slavíček, P, Beneš, M.: Zajímavý výskyt opálů v Dukovanech na Třebíčsku. Časopis pro mineralogii a geologii, 1985, roč. 30, č. 3, s. 333.
      • Oslavany
        • Hrubšice
Jirásek, J.: Nový nález huntitu u Hrubšic na západní Moravě a otázka jeho vzniku. Acta Musei Moraviae, Sci. geol., 2007, roč. 92, s. 103-109.
        • Mohelno
Němec, F., 1937: Mineralogie, petrografie a geologie okolí Mohelna. Monografie hadce (monografie hadce). – In: Archiv Svazu pro ochranu přírody a domoviny v zemi Moravskslezské, Brno, 49-112.
      • Tišnov
Uwe Kolitsch (visual ID)
    • Vysočina Region
      • Bystřice nad Pernštejnem
Kopa, D.: Mineralogie a petrografie hadce od Věchnova. Časopis Slezského musea, series A: vědy přírodní, 1960, roč. 9, s. 17-24.
Houzar, S., Pošmourný, K.: Ag-Pb-Zn rudní mineralizace u Jemnice na jihozápadní Moravě. Acta Musei Moraviae, Scientiae naturales, 1991, roč. 76, s. 95 - 103.
      • Křižanov
Paulis P. (2001): Nejzajimavejsi mineralogicka naleziste Moravy a Slezska. Kuttna, Kutna Hora.
Houzar, S., Novák, M., Doležalová, H., Hrazdil, V., Pfeiferová, A.: Přehled mineralogie, petrografie a geologie nedvědických mramorů, svratecké krystalinikum. Acta Musei Moraviae, Sci. geol., 2006, roč. 91, s. 3-77.
Petr Pauliš: Nejzajímavější mineralogická naleziště Moravy a Slezska II.(2005)
      • Štěpánov nad Svratkou
Velebil, D., Kráčmar, L.: Ložisko Borovec u Štěpánova (štěpánovský revír). Minerál, 2002, roč. 10, č. 3, s. 163-181.
      • Velké Meziříčí
Novák, M., Staněk, J.: Lepidolitový pegmatit od Dobré Vody u Velkého Meziříčí, západní Morava. Acta Musei Moraviae, Scientiae geologicae, 1999, roč. 84, s. 3 - 44.
      • Žďár nad Sázavou
Staněk, J.: Parageneze minerálů pegmatitových žil z Hatí u Dolních Borů na západní Moravě. Acta Mus. Moraviae, Sci. nat., vol. 76, pages 19-49.
Staněk, J.: Asociace minerálů významnějších pegmatitových žil v Hatích u Dolních Borů na západní Moravě. Acta Musei Moraviae, Scientiae naturales, 1997, roč. 82, 3-19.
Novák, M., Houzar, S., Pfeiferová, A.: Přehled mineralogie, petrografie a historie klasické lokality lepidolitového pegmatitu v Rožné u Bystřice nad Pernštejnem, západní Morava. Acta Musei Moraviae, Sci. geol., 83:3-48.
Petr Pauliš (2001): Nejzajímavější mineralogická naleziště Moravy a Slezska. Kuttna, Kutná Hora.
        • Věžná
Canadian Mineralogist, Vol 17, 1979, pp. 583-588.
http://pruvodce.geol.morava.sci.muni.cz/Vezna_hadec/Vezna_hadec_text.htm; Petr Pauliš (2001): Nejzajímavější mineralogická naleziště Moravy a Slezska. Kuttna, Kutná Hora.
    • Zlín Region
      • Komňa
Pauliš, P: Nejzajímavější mineralogická naleziště Moravy a Slezska. Kutná Hora: Kuttna, 2001, s. 42-44.
Democratic Republic of Congo (Zaïre)
 
  • Kasaï (Kasaï-Occidental)
Edwards, M.G. (1917) The American Mineralogist, 2, #7, 88-89.
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Shinkolobwe
MinRec 20:287-288
Denmark
 
Claus Hedegaard collection (nos. 613, 7010, 7242 a.o.)
    • Borðoy Island
Zeolite collection of Volker Betz; SMLS Journal 234 Nov/Dec 2011
    • Streymoy Island
      • Tórshavn
[var: Opal-CT] Caucia, F., Marinoni, L., Leone, A. (2013): Physical, geochemical and gemological properties of opals from Faroe Islands. Neues Jahrbuch für Mineralogie - Abhandlungen.191, 33-43
  • Midtjylland Region
    • Skive
Bøggild (1943)
  • Nordjylland Region
    • Morsø
      • Mors Island
        • Ejerslev
Bøggild (1943); Bøggild (1943)
Torben Kjeldgård photo & specimen
Ecuador
[var: Fire Opal] Rocks&Min 51:11
  • Chimborazo Province
    • Alausi Canton
[var: Geyserite] http://www.municipiodealausi.gob.ec/UserFiles/File/TIXAN.pdf
Egypt
 
  • Western Desert
S. Tosson et al. , Bull. Soc. Fr. Minéral. Cristallogr. , 1974, 97, pp. 27-39.
Ethiopia
 
  • Afar Province
Ethiopian Gem Association Ethiopian Gem Association http://tracktech.net/ega/index.php
  • Amhara Province
    • Mezezo
Gem Information, 23 May 2007 (Japan Germany Gemmological Laboratory), 20-24.
Rondeau, B.; Mazzero, F.; Bekele, E.; Gauthier, F. P.; Fritsch, E., 2009, New play-of-color opal from Welo, Ethiopia, Gems & Gemology, 45, (1), 59-60.
      • Delanta Woreda
        • Wegeltena (Wegel Tena)
Schäfer, K. (2012): Feuer im Wasser: Die Vorkommen von neuartigem Edelopal in Äthiopien. Lapis 37 (2), 13-16
  • Oromia Province (Oromiya Province)
Alfredo Petrov field observations, 1972.
  • Sidamo-Borana Province
[var: Opal-AN] (Rock Currier collection)
Fiji
 
  • Vanua Levu
    • Nukundamu
Finland
 
  • Southern Finland Region
    • Kotka
Lahti Seppo I. 2011. Kotkan topaasilouhoksesta ja sen mineraaleista. Kivi-lehti 4.
  • Southwestern Finland Region
    • Salo
Niskanen, Maria (2014). Salitun felsisten juonten mineraalikoostumus ja evoluutio. Pro Gradu-tutkielma (2014). Geotieteiden ja Maantieteen Laitos Helsingin Yliopisto.gedrite
  • Western and Inner Finland Region
    • Alavus
Joel Dyer Collection
    • Korsnäs
The world of opals By Allan W. Eckert
France
 
  • Aquitaine
[var: Wood Opal] Daniel Toro specimen
    • Lot-et-Garonne
[var: Opal-CT] Econ Geol (1989) 84:1541-1556
  • Auvergne
    • Allier
M Arliguie collection
    • Cantal
      • Cantal Mts
        • Le Lioran
Yves Masson specimen
      • Menet
Vessely Yannick collection
      • Saint-Flour
        • Faverolles
[var: Opal-AN] Robin Fialip
        • Loubaresse
[var: Wood Opal] http://www.brgm.fr/volcan/ressourcesmin.htm
    • Haute-Loire
      • Brioude
        • Saint-Beauzire
P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989
      • Le Puy-en-Velay
        • Ceyssac
[var: Opal-AN] Collected by Stéphane Jamon
      • Mazeyrat-d'Allier
[var: Opal-AN] Pierre Le Roch collection
      • Paulhaguet
        • Jax
      • Pradelles
        • Landos
[var: Opal-AN] Aufschluss 1974(3), 193-197
    • Puy-de-Dôme
      • Besse-et-Saint-Anastaise
http://gsa.confex.com/gsa/inqu/finalprogram/abstract_54492.htm / The XVI INQUA Congress, Reno, Nevada, USA
      • Champeix
        • Saint-Nectaire
[var: Forcherite] Alain TUEL collection
      • Clermont-Ferrand
[var: Opal-CT] Remi Bornet Collection
        • Saulzet-le-Chaud
"Les minéraux, leurs gisements, leurs associations", P. Bariand, F. Cesbron et J. Geffroy (1977), Editions Minéraux et Fossiles, BRGM
[var: Opal-AG]
[var: Opal-CT] Remi Bornet Collection
[var: Opal-CT] Aimé Rudel : "Curiosités Géologiques d'Auvergne et du Velay", Editions Volcans, 1970
      • Issoire
        • Perrier
my collection
        • Saint-Babel
[var: Opal-AN] Barrier, D., Devolle, J.-C., Médard, P, Naud, E. Naud & Pourtier, G. (2009): Si l'amesite m'était Comté... ou pas d'haüyne à Prudeux, Le Cahier des Micromonteurs, 103, 3-8.
      • Lempdes
[var: Opal-CT] Remi Bornet Collection
[var: Opal-CT] Remi Bornet Collection
[var: Opal-CT] Mallard, E., 1890, Bull. Soc. Min., v13, p. 63
[var: Opal-CT] Remi Bornet Collection
[var: Opal-CT] Remi Bornet Collection
      • Pontgibaud
        • Saint-Jacques-d'Ambur
        • Saint-Ours-les-Roches
Mboungou-Kongo J.B. (2002), L'hématite spéculaire du puy de Tunisset, Chaîne des Puys (Puy de Dôme), Le Régne Minéral, n°46, pp: 51-55
      • Puy-Guillaume
        • Lachaux
J.-J. Périchaud: "Où trouver les minéraux d'Auvergne", Vol. 1, Editions l'Instant Durable (Clermont-Ferrand), 1985, p. 92
J.-J. Périchaud: "Où trouver les minéraux d'Auvergne", Vol. 1, Editions l'Instant Durable (Clermont-Ferrand), 1985, p. 92
J. Geffroy, J.A. Sarcia, J. Chervet : "Les Minéraux Uranifères Français", 1960, Institut National des Sciences et Techniques Nucléaires / Saclay - PUF.
P.-C. Guiollard (2002), L'uranium du Morvan et du Forez, Ed. P.-C. Guiollard, Fichous(64), 95 pp.
J. Chervet, G. Branche : "Contribution à l'étude des minéraux secondaires d'uranium français", ENSP Nancy, 1955
Queneau Patrice Collection
        • Philibin
      • Saint-Germain-Lembron
        • Gignat
G. Artioli et al. , Am. Min. , V84, 1999, pp. 1445-1450.
      • Thiers
        • Saint-Rémy-sur-Durolle
J. Chervet and G. Branche : "Contribution à l'Etude des Minéraux Secondaires d'Uranium Français", ENSG, Nancy, 1955
      • Veyre-Monton
        • La-Roche-Blanche
J.-J. Périchaud: "Les Minéraux d'Auvergne", Vol. 1, 1985
  • Brittany
    • Côtes-d'Armor
      • Plémet
Bibinger, G. et Lysiak, J.-L.(2014) - L'opale noire de Saint-Lubin, Plémet, Côtes-D'Armor. Le Règne Minéral, 120, pp. 54-55, editions du Piat.
      • Plounévez-Quintin
        • Trémargat
Germain C., Guillou A. (1988), Le Cahier des Micromonteurs, n°3, 3-7
    • Morbihan
      • Pontivy
        • Guern
R. Pierrot, L. Chauris, C. Laforêt and F. Pillard : "Inventaire Minéralogique de la France N° 9 : Morbihan", BRGM, 1980.
  • Centre
    • Cher
      • Bourges
The Quincyte pigments: fossil quinones in an Eocene clay mineral. W.G. Prowse, K.I. Arnot, J.A. Rechka, R.H. Thomson and J.R. Maxwell. Tetrahedron 47, 1991, 1095-1108. K.I.
  • Ile-de-France
    • Paris
[var: Menilite]
  • Languedoc-Roussillon
    • Gard
      • Alzon
[var: Opal-AN] Patrice Queneau Collection
TREILLARD Michel collection
      • Lodève
"Giorgio Bortolozzi (visual identification)"
    • Pyrénées-Orientales
Berbain,C., Riley, T., Favreau, G., (2012): Phosphates des pegmatites du massif des Albères (Pyrénées-Orientales). Le Cahier des Micromonteurs. 117, 121-172
        • Collioure (Cotlliure)
BERBAIN. C, RILEY. T, FAVREAU. G, (2012) Phosphates des pegmatites du massif des Albères. Ed Association Française de Microminéralogie
      • Mosset
[var: Opal-AN] Remy, P., Gatel, P., Meisser, N. (2014): Indice à terres rares de Mosset (Pyrénées-Orientales). Le Cahier des Micromonteurs, 1-2014, 3-17.
  • Limousin
    • Corrèze
      • Meymac
[var: Opal-AN] Ansermet, S., Cuchet, S. & Meisser, N. (2010): Minéralogie de la mine de La grange, Meymac, Corrèze. Le Règne Minéral, 91: 23-31
    • Haute-Vienne
      • Razès
J. Geffroy, J.A. Sarcia, J. Chervet : "Les Minéraux Uranifères Français", 1960, Institut National des Sciences et Techniques Nucléaires / Saclay - PUF.
  • Lower Normandy
    • Manche
Yale Peabody Museum
  • Midi-Pyrénées
    • Aveyron
      • Decazeville
        • Firmi
    • Haute-Garonne
      • Moncaup
Inventaire Minéralogique de la France numéro 8 Haute Garonne 31 Editions du BRGM 1978 page 115
    • Tarn
      • Castelnau-de-Brassac
        • Fumade
Jean-Marie LAURENT's collection
  • Poitou-Charentes
    • Deux-Sèvres
      • Le Temple
Le Cahier des micromonteurs, 2002, N°75, pp 8-25
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
Fröhlich F., Mari G., Mari D. (2001), Les silicifications hydrothermales à opale de Biot (Alpes-Maritimes), Le Règne Minéral, n°40, pp: 5-12
      • Saint-Etienne-de-Tinée
Chollet Pascal Collection
    • Var
      • Agay
[var: Opal-AN] self collected by S. MAURY
      • Les Adrets
[var: Opal-AN] Stéphane Maury collection
    • Vaucluse
      • Apt
F. Roulin et al. , 1986, 109, pp. 349-357.
  • Rhône-Alpes
    • Ardèche
      • Privas
Yves Masson specimens
        • Saint-Priest
Bull. Soc. Franç. Minéralo. Cristallo. , 1974, 97, pp. 450-464.
    • Loire
      • Saint-Etienne
        • Saint-Priest-en-Jarez
G. Demarcq, 1973, "Guides Géologiques Régionaux : Lyonnais, Vallée du Rhône" , p. 88, Masson.
      • Saint-Georges-en-Couzan
        • Châtelneuf
[var: Opal-AN] Anthony Geneyton Collection
      • Saint-Haon-le-Châtel
        • Ambierle
BRGM (1981) - Fiche BSS 06478X4001/GT
    • Rhône
      • Le Bois d'Oingt
        • Chessy-les-Mines
[Le Cahier des Micromonteurs 1988, 4, p.6-46]
French West Indies
 
  • Guadeloupe
    • Basse-Terre
Olivier Mével spécimen
Georgia
 
  • Adjaria Autonomous Republic
[var: Wood Opal] Alexander G. Tvalchrelidze, Georges Morizot (2003) Mineral Resource Base of the Southern Caucasus and Systems for its Management in the XXIst Century. Springer 204pp
  • Kvemo Kartli Region
    • Bolnisi District
Ramaz Migineishvili (2005) Hybrid nature of the Madneuli Cu-Au deposit, Georgia. IGCP Project 486, 2005 Field Workshop, Kiten, Bulgaria, 14-19 September 2005
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Badenweiler
        • Schweighof
[var: Opal-AN] S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Haslach
        • Schnellingen
[var: Opal-AN] Wittern: "Mineralfundorte in Deutschland", 2001; Schmeltzer, H. (1993): Die Grube Segen Gottes bei Schnellingen - ein polymetallisches Mineralvorkommen. Der Erzgräber, 7 (2), 34-35.
      • Hornberg
[var: Opal-AN] Lapis 23(12), 45 (1998)
      • Kandern
[var: Opal-AN] Brill, A. R. (2011): Die Malsburger Granitsteinbrüche bei Kandern im südwestlichen Schwarzwald. Lapis 36 (7-8), 43-51; 70.
      • Menzenschwand
        • Vorderdorf
[var: Opal-AN] S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Schapbach
        • Wildschapbach valley
[var: Opal-AN] K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Schauinsland Pb-Zn mining district
        • North field
[var: Opal-AN] S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Schönau
[var: Opal-AN] K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Titisee-Neustadt
[var: Opal-AN] K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Todtnau
[var: Opal-AN] http://www.mineralienatlas.de/lexikon/index.php/Deutschland/Baden-W%FCrttemberg/Schwarzwald/Todtnau/Lisb%FChl
      • Waldshut
        • Detzeln
[var: Opal-AN] Hess, E., Graeser, S. & Gabriel, W. (2011): Das Porphyrwerk Detzeln im Steinatal und seine Mineralien. Lapis 36 (4), 25-35; 54.
      • Wolfach
        • Oberwolfach
          • Rankach valley
[var: Opal-AN] Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
    • Hegau
      • Singen
Lapis 1978(1), 19
    • Kaiserstuhl
      • Bötzingen
[var: Opal-AN] Fricke, G., (1988): Der Kaiserstuhl und seine Minerale, Der Aufschluss, Vol. 39(2), 74-76
      • Burkheim-Sponeck
[var: Opal-AN] No reference listed
      • Ihringen
[var: Opal-AN] Aufschluss 1988(2), 76
      • Oberbergen
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Oberrotweil
[var: Opal-AN] Fricke, G., (1988): Der Kaiserstuhl und seine Minerale, Der Aufschluss, Vol. 39(2), 74-76
      • Sasbach
[var: Opal-AN] Bega photo
[var: Opal-AN] No reference listed
    • Odenwald
      • Schriesheim
        • Ursenbach
[var: Opal-AN] S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Bavaria
    • Franconia
      • Fichtelgebirge
        • Kemnath
[var: Opal-AN] Weiss: "Mineralfundstellen, Deutschland West", 1990
        • Weißenstadt
          • Großer Waldstein
Wittern: "Mineralfundorte in Deutschland", 2001
          • Kirchenlamitz
[var: Opal-AN] Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Wunsiedel
          • Schönbrunn
[var: Wax Opal] F. Müller: "Bayerns steinreiche Ecke", 2nd. ed. (1984), pp. 59-62
      • Franconian Forest
        • Hof
          • Joditz
[var: Opal-AN] F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt und Druckerei GmbH (Hof), 1984
      • Maroldsweisach
[var: Opal-AN] Wittern: "Mineralfundorte in Deutschland", 2001
      • Münchberg Metamorphic complex
        • Oberkotzau
          • Wurlitz
[var: Opal-AN] Rost, F. (1949): Contributions to Mineralogy and Petrology 1(5/6), 627-688.
      • Spessart
        • Hösbach
          • Sailauf
            • Hartkoppe
see locality page
    • Lower Bavaria
      • Bodenmais
Obermüller, T., (1993): Der Silberberg bei Bodenmais/Bayer. Wald, Der Aufschluss, Vol. 44, 201-224
      • Röhrnbach
[var: Opal-AN] Habel, M. (2009): Der Granodioritbruch der Fa. Josef Uhrmann OHG, Steinerleinbach bei Röhrnbach. Mineralien-Welt 20 (2), 66-86.
      • Untergriesbach
        • Kropfmühl-Untergriesbach Graphite Mining District
[var: Opal-AN] S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Kropfmühl
[var: Opal-AN] Mineralien-Welt 18 (5) (2007) 20-26.
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Vilshofen
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Upper Palatinate
      • Auerbach
[var: Opal-AN] peter neschen collection
      • Flossenbürg
[var: Opal-AN] Weiss: "Mineralfundstellen, Deutschland West", 1990
      • Wald
        • Roßbach
[var: Opal-AN] S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Hesse
    • Gießen (Giessen)
      • Großen-Buseck
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Hausen
[var: Opal-AN] S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Rabenau
        • Londorf
[var: Opal-AN] S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Main valley
      • Dietesheim - Steinheim
[var: Opal-AN] S. Weiss: Mineralfundstellen, Deutschland West, Weise (Munich), 1990
      • Hanau
[var: Opal-AN] S. Weiss: Mineralfundstellen Deutschland West, Weise (Munich), 1990
    • Neuberg
[var: Opal-AN] Bischof, C. (1874): Polytechnisches Journal 174, 140-146.
    • Odenwald
      • Bensheim
        • Hochstädten
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Fürth
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Gorxheimertal
        • Gorxheim
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Lautertal (Odenwald)
        • Raidelbach
          • Katzenstein
Collection of Steffen Michalski, ex-collection and collected by Klaus PETITJEAN
        • Reichenbach
          • Borstein
Collection of Steffen Michalski, ex-collection and collected by Klaus PETITJEAN
          • Hohenstein
[var: Opal-AN] No reference listed
      • Otzberg
Nickel, E., and Fettel, M. (1985): Odenwald. Sammlung geologischer Führer Vol. 65, 2nd ed., Bornträger (Berlin, Stuttgart), 231 pp.
      • Roßdorf
[var: Opal-AN] S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Vogelsberg
      • Herbstein
[var: Opal-AN]
      • Homberg
        • Nieder-Ofleiden
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Hungen
        • Langd
[var: Opal-AN]
        • Oberwiddersheim
[var: Opal-AN]
      • Reichelsheim
        • Bingenheim
[var: Opal-AN] S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Blofeld
[var: Opal-AN] S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Schotten
        • Gonterskirchen
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Wetzlar
      • Rodheim-Bieber
Weiss: "Mineralfundstellen, Deutschland West", 1990
  • Lower Saxony
    • Celle
      • Faßberg
Reinsch, D. (1985) Lagerstätten mineralischer Rohstoffe im Braunschweiger Land. Clausthaler Geologische Abhandlungen. Sonderband Nr.4.
Reinsch, D. (1985) Lagerstätten mineralischer Rohstoffe im Braunschweiger Land. Clausthaler Geologische Abhandlungen. Sonderband Nr.4.
    • Göttingen
      • Adelebsen
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Harz
      • Clausthal-Zellerfeld
        • Bockswies veins
          • Oberschulenberg
Lapis, 11 (1), 9-18+42
      • Goslar
Dietrichs, J. (2006): Die Mineralien der Nickelgrube "Großfürstin Alexandra" im Ostharz. Lapis 31 (6), 28-30; 70.
      • St Andreasberg District
No reference listed
  • North Rhine-Westphalia
    • Aachen
      • Alsdorf
T. Witzke, F. de Wit, U. Kolitsch and G. Blaß (2015): Mineralogy of the Burning Anna I Coal Mine Dump, Alsdorf, Germany. Chapter 7, 203-240; in: Stracher, G. B., Prakash, A. and Sokol, E. V.: Coal and Peat Fires: A Global Perspective, Volume 3: Case Studies - Coal Fires, Elsevier.
    • Siebengebirge
      • Bonn
        • Bad Godesberg
[var: Opal-AN] Brauns, R. (1922): Die Mineralien der Niederrheinischen Vulkangebiete, Schweitzerbart Stuttgart
Brauns, R., (1922): Die Mineralien der Niederrheinischen Vulkangebiete, Schweizerbart, Stuttgart
        • Oberkassel (Obercassel)
Dechen, H. von (1852): Geognostische Beschreibung des Siebengebirges am Rhein, Cohen Bonn
      • Königswinter
Andreas Gerstenberg collection
Brauns, R., (1922): Die Mineralien der Niederrheinischen Vulkangebiete, Schweizerbart, Stuttgart
Brauns, R., (1922): Die Mineralien der Niederrheinischen Vulkangebiete, Schweizerbart, Stuttgart
    • Siegerland
      • Neunkirchen
        • Hohenseelbachskopf
[var: Wood Opal] Haege, T. (1887): Die Mineralien des Siegerlandes und der angrenzenden Gebiete. 50 pp.
        • Salchendorf
[var: Opal-AN] Klein, E. (1999): Ein Basanit-Vorkommen nordwestlich von Salchendorf bei Neunkirchen / Siegerland. Der Aufschluss, 50, 203-206.
  • Rhineland-Palatinate
    • Eifel
      • Daun
        • Hinterweiler
Blass, G., Graf , HW., Neue Mineralienfunde aus der Vulkaneifel, MW 1/2001
        • Oberstadtfeld
[var: Opal-AN] Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München (2. Auflage), 1987
      • Hillesheim
[var: Opal-AN] Blaß, G. & Kruijen, F. (2013): Die Mineralogischen Neuigkeiten aus der Vulkaneifel. Mineralien-Welt 24 (3), 33-41.
[var: Opal-AN] Hentschel, G.(1987): Die Mineralien der Eifelvulkane, Weise Verlag München, 2. Auflage
        • Walsdorf
[var: Opal-AN] Hentschel, G.(1987): Die Mineralien der Eifelvulkane, Weise Verlag München, 2. Auflage
        • Zilsdorf
[var: Opal-AN] Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München (2. Auflage), 1987
      • Laach lake volcanic complex
        • Kruft
Hentschel, G., Die Minerale in Auswürflingen des Laacher -See –Vulkans, Der Aufschluss, SB 33, 65-105, 1990
        • Mendig
          • Niedermendig
Hentschel, G., Die Minerale in Auswürflingen des Laacher -See –Vulkans, Der Aufschluss, SB 33, 65-105, 1990
Hentschel, G., Die Minerale in Auswürflingen des Laacher -See –Vulkans, Der Aufschluss, SB 33, 65-105, 1990
            • Wingertsberg
Hentschel, G., Die Minerale in Auswürflingen des Laacher -See –Vulkans, Der Aufschluss, SB 33, 65-105, 1990
      • Mayen
        • Ettringen
          • Bellerberg volcano
[var: Opal-AN] Blass, G., Graf, H.W., Neufunde von bekannten Fundorten (VI), Mineralien-Welt 3/6,32-35, 1992
      • Mendig
        • Bell
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
    • Lahn valley
      • Laurenburg
[var: Opal-AN] S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Palatinate
      • Kusel
        • Reichweiler
MÜLLER, G. (1990): Mineralisationen vom Karrenberg bei Reichweiler (Kreis Kusel).- Der Aufschluss, 41 (H. 5), S. 299-311.
      • Winnweiler
        • Imsbach
Lapis, 9 (5), 36-39.
Lapis, 9 (5), 36-39.
Wittern: "Mineralfundorte in Deutschland", 2001
Wittern: "Mineralfundorte in Deutschland", 2001
      • Wolfstein
        • Königsberg
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Westerwald
      • Linz am Rhein
        • Rheinbreitbach
Weiss: "Mineralienfundstellen, Deutschland West", Weise (Munich), 1990
  • Saarland
    • Nonnweiler
      • Kastel
Thomas Kleser & Erwin Ecker Collections
  • Saxony-Anhalt
    • Halle
      • Petersberg
Wittern: "Mineralfundorte in Deutschland", 2001
Wittern: "Mineralfundorte in Deutschland", 2001
    • Harz
      • Gernrode
        • Hagental
Thomas Lühr collection
      • Harzgerode mining district
        • Güntersberge
Thomas Lühr
      • Wernigerode
        • Hasserode
Wittern: "Mineralfundorte in Deutschland", 2001
  • Saxony
    • Chemnitz
      • Hartmannsdorf
Vollstädt, H. (1979): Einheimische Minerale, VEB Deutscher Verlag für Grundstoffindustrie, Leipzig, p. 289.
      • Markersdorf
Wittern: "Mineralfundorte in Deutschland", 2001
    • Döbeln
[Precious Opal] H. Vollstädt, R. Baumgärtel: "Einheimische Edelsteine", 2nd. ed., Steinkopff (Dresden), 1977
    • Erzgebirge
      • Altenberg
Mineralien-Welt, (2), 17-39.
Lapis 17(12), 24-33
      • Breitenbrunn District
        • Antonsthal
Gröbner J., Kolitsch U.; Neufunde aus dem Erzgebirge (II), Mineralien-Welt Jg 17 (2006), 3, pag. 22-27.
      • Ehrenfriedersdorf
Wittern: "Mineralfundorte in Deutschland", 2001
[var: Alumocalcite] Frenzel, A. (1874): Mineralogisches Lexicon fpr das Königreich Sachsen, Leipzig.
        • Blauenthal
[var: Milk Opal] Tröger, S. (2009): Der Steinbruch Fahsel im Eibenstocker Granit, Westerzgebirge. Lapis 34 (6), 49-52.
        • Sosa
          • Auersberg
[var: Cacholong] Lapis 33 (10), 38-40.
Lapis 11(7/8), 13-60 (1986)
        • Brand-Erbisdorf
August Frenzel (1874): Mineralogisches Lexicon fpr das Königreich Sachsen, Leipzig.
      • Johanngeorgenstadt District
Frenzel, A. (1874): Mineralogisches Lexicon für das Königreich Sachsen, Leipzig.
        • Steinbach
Wittern: "Mineralfundorte in Deutschland", 2001
      • Niederschlag-Bärenstein District
        • Bärenstein
          • Niederschlag
Lapis, 19 (4), 13-22+50.
      • Schneeberg District
        • Neustädtel
Lapis 30(7/8):77 (2005)
      • Schwarzenberg District
        • Pöhla
Wittern: "Mineralfundorte in Deutschland", 2001
Andreas Gerstenberg collection
    • Oberlausitz
      • Görlitz
[var: Opal-AN] www.minmax.net
        • Neißeaue
Witzke, T. & Giesler, T. (2013): Seltene Phosphate und Vanadate von Emmerichswalde bei Görlitz/Sachsen. Mineralien-Welt 24 (2), 40-55
        • Rengersdorf
[var: Opal-AN] T. Witzke & T. Giesler (1993): Dufrenit und Opal von Rengersdorf/Lausitz.- Mineralien-Welt 4 (5), 14
      • Kamenz
Wittern: "Mineralfundorte in Deutschland", 2001
Wittern: "Mineralfundorte in Deutschland", 2001
    • Vogtland
      • Lengenfeld
        • Pechtelsgrün
Lapis, 17 (7/8), 26-33+90
      • Oelsnitz
[var: Opal-AN] Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German)
  • Schleswig-Holstein
    • Kiel
      • Preetz
[var: Wood Opal] A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
  • Thuringia
    • Gera
      • Weida
Richter, E. & Rüger, F. (2010): Der Diabas-Tagebau Loitsch in Thüringen und seine Mineralien. Lapis 35 (2), 13-22; 54.
    • Wurzbach
      • Weitisberga
Wittern: "Mineralfundorte in Deutschland", 2001
Germany & Czech Republic
 
  • Saxony & Ústí Region (Bohemia; Böhmen; Boehmen)
    • Erzgebirge; Krusné Hory Mts
Petr Fuchs
Greece
 
  • Aegean Islands Department (Aiyaíon)
    • Kykládes Prefecture
      • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
        • Kimolos Island (Argentiera)
[var: Opal-CT] Godelitsas, A.; Gamaletsos, P.& Roussos-Kotsis, M.(2010): Mordenite-bearing tuffs from Prassa quarry, Kimolos island, Greece. European Journal of Mineralogy. 22, 797-811
        • Milos Island (Melos)
[var: Opal-AN] No reference listed
Kilias, S.P., Naden, J., Cheliotis, I., Shepherd, T.J., Constandinidou, H., Crossing, J., and Simos, I. (2001): Mineralium Deposita 36, 32-44.
    • Lésvos Prefecture (Lesbos; Mytilene; Mytilini)
      • Lesbos Island (Nisos Lésvos; Mytilene; Mytilini)
[var: Opal-AN] Christophos
    • Sámos Prefecture
      • Sámos Island
Econ Geol (1989)84:788-798
[var: Opal-CT] Helvaci, C., Stamatakis, M. G., Zagouroglou, C., & Kanaris, J. (1993). Borate minerals and related authigenic silicates in northeastern Mediterranean Late Miocene continental basins. Exploration and Mining Geology, 2(2), 171-178.
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
[var: Opal-AN] Ritter, K.H. (1978): Hyalit und Langit von Lavrion. Lapis, 3(10), 11.
  • Ionian Islands Department
    • Lefkas Prefecture
Econ Geology (1993)88:91-103
  • Thraki Department (Thrace; Thracia)
    • Évros Prefecture
      • Alexandroupoli (Alexandroupolis)
Vodouris, P. C. (2011): Conditions of formation of the Mavrokoryfi high-sulfidation epithermal Cu–Ag–Au–Te mineralization (Petrota Graben, NE Greece). Mineralogy and Petrology 101, 97-113.
Greenland
 
  • Kujalleq
    • Narsaq
      • Ilímaussaq complex
Petersen, O.V., Giester, G., Brandstätter, F., Niedermayr, G. (2002): Nabesite, a new mineral species from the Ilimaussaq alkaline complex. Canadian Mineralogist. 40, 173-181
  • Qaasuitsup
    • Qeqertarsuaq Island (Disko Island)
Bøggild, O.B. (1953): The Mineralogy of Greenland. Meddelelser om Grønland, Bd. 149. Nr. 3. 445 pages. (p. 352)
Honduras
[var: Fire Opal] Rocks&Min 54:266
  • Gracias a Dios Department
Rob Lavinsky specimen
  • Lempira Department
Prüfer, P. (2002): Basalt-Opal aus Honduras. Lapis 27 (4): 35
[Precious Opal var: Black Opal] N. Jb. Mineral. Abh. 186 (2009) 11-20.
Hungary
[Precious Opal] www.giant.net.au/users/bmi/prof.htm.
  • Borsod-Abaúj-Zemplén Co.
    • Zemplén Mts (Tokaj Mts)
      • Abaújszántó
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae III.
Szakáll: Topographia Mineralogica Hungariae
      • Alsókéked
Szakáll & Weiszburg: Telkibánya ( Top. Min. Hun.)
      • Arka
Szakáll & Gatter: Hungarian Mineral Species, 1993
      • Bózsva
Collection of Gábor _Mesics
Szakáll & Jánosi: Minerals of Hungary, 1995
Koch:Minerals of Hungary
[var: Opal-AN]
[var: Gold Opal]
[var: Opal-AN]
Szakáll & Gatter: Hungarian Mineral Species, 1993
Koch: Minerals of Hungary, 1985
      • Fony
Szakáll & Jánosi: Minerals of Hungary, 1995
      • Füzérradvány
Szakáll & Jánosi: Minerals of Hungary, 1995
      • Golop
[var: Opal-AN]
      • Gönc
Szakáll & Jánosi : Minerals of Hungary, 1995
[var: Opal-AN] Koch: Minerals of Hungary, 1985
      • Hejce
Szakáll & Jánosi: Minerals of Hungary, 1995
      • Hollóháza
      • Komlóska
Koch: Minerals of Hungary, 1985
Szakáll & Jánosi: Minerals of Hungary, 1995
      • Legyesbénye
[var: Opal-AN] Szakáll: Top.Min. Hun.
Szakáll: Minerals of Szerencsi Hills (Top. Min. Hun.)
      • Megyaszó
[var: Opal-AN]
[var: Fire Opal]
      • Mogyorósok
Szakáll-Gatter-Szendrei: Minerals of Hungary 2005
[var: Opal-AN] [www.johnbetts-fineminerals.com]
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae III.
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae III.
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae III.
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae III.
Szakáll: Mineralogica Topographia Hungariae III.
Szakáll:Top. Min. Hun.
      • Nagyhuta
Szakáll & Jánosi: Minerals of Hungary, 1995
[var: Opal-AN] Szakáll & Jánosi: Minerals of Hungary, 1995
      • Nyíri
Szakáll & Gatter: Hungarian Mineral Species, 1993
      • Rátka
Szakáll:100 Hungarian Mineral Localities,2004
      • Regéc
Mineral Species of Hungary, 2005
      • Sárospatak
Szakáll & Jánosi: Minerals of Hungary, 1995
Szakáll & Jánosi: Minerals of Hungary, 1995
[var: Milk Opal]
      • Szerencs
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae III.
      • Tállya
[var: Opal-AN]
Topographia Mineralogica Hungariae II. Szakáll&Weiszburg
[var: Wood Opal]
Szakáll & Weiszburg: Telkibánya
[var: Opal-AN] Szakáll-Weiszburg: Telkibánya
Szakáll-Gatter: Hungarian Mineral Species, 1996
      • Tokaj
Szakáll & Jánosi: Minerals of Hungary, 1995
[var: Opal-AN]
Koch: Minerals of Hungary,1986
Koch: Minerals of Hungary, 1985
  • Fejér Co.
    • Sárszentmiklós
Szakáll: 100 Hungarian Mineral Locality
    • Szár Hill
      • Kőszárhegy
Szakáll & Jánosi: Minerals of Hungary, 1995
    • Velencei Mts
      • Pázmánd
Szakáll & Jánosi: Minerals of Hungary, 1985
  • Heves Co.
    • Bükk Mts
[var: Wood Opal] GEODA 2004
    • Mátra Mts
      • Gyöngyös
Mineral Species of Hungary, 2005
[var: Hungarian Opal]
[var: Geyserite]
GEODA 2002
Szakáll-Jánosi: Minerals of Hungary,1995
[var: Opal-AN] Own found,2006
Book: 100 collecting sites of Hungary
      • Gyöngyöspata
http://www.geomania.hu/lelohely.php?lelohely=379
[var: Opal-AN] http://www.geomania.hu/lelohely.php?lelohely=323
      • Gyöngyössolymos
[var: Opal-AN] Szakáll-Gatter-Szendrei: Hungarian Mineral Species,2006
[var: Opal-AN] http://geomania.hu/lelohely.php?lelohely=416
[var: Opal-AN] Körmendy Regina (2011): A Cseternás-bérci és Szén-pataki ércesedés nyomon követése (2011. augusztusi, októberi és novemberi kutatások eredményei). Lelőhely 2011/VII. p.8-18
MAMIT
[var: Opal-AN] T Ungvári collection
Geoda, 2003
Szakáll-Jánosi: Minerals of Hungary
[var: Opal-AN] GEODA/2000, Own found.2006
[var: Opal-AN] http://www.geomania.hu/lelohely.php?lelohely=441
GEODA/1997
Szakáll-Gatter: Hungarian Mineral Species
      • Kisnána
[var: Opal-AN] Dávid Szabó
      • Markaz
http://www.mineral.hermuz.hu
      • Mátraderecske
Szakáll-Jánosi: Minerals of Hungary, 1995
      • Mátraszentimre
Szakáll & Jánosi: Minerals of Hungary, 1995
      • Mátraszentlászló
GEODA/2005
      • Recsk
[var: Opal-AN] Szakáll - Gatter: Minerals of Hungary
  • Nógrád Co.
    • Börzsöny Mts
[var: Wood Opal]
    • Cserhát Mts
      • Bercel
Szakáll & Jánosi: Minerals of Hungary, 1995
[var: Wood Opal] C. Lemanski, Jr. (re-entry of lost Mindat data).
[var: Opal-AN]
      • Nagylóc
Szakáll & Jánosi: Minerals of Hungary, 1995
[var: Wood Opal] GEODA 2004
      • Sámsonháza
Szakáll & Jánosi: Minerals of Hungary, 1995
      • Szanda
GEODA 2004
    • Mátra Mts
Mineral Species of Hungary, 2005
      • Szurdokpüspöki
Szakáll: 100 Hungarian Mineral Locality, 2004
  • Pest Co.
    • Börzsöny Mts
      • Szokolya
        • Öl Hill
Sándor Szakáll (2004): 100 Hungarian mineral localities
    • Szentendre
Szakáll: 100 Hungarian Mineral Locality, 2004
  • Veszprém Co.
    • Bakony Mts
Koch: Minerals of Hungary, 1985
      • Várpalota
Szakáll & Jánosi: Minerals of Hungary, 1995
    • Balaton Uplands
Kiss, G. & Molnár, F. (2006) Mineralogy And Origin Of Geodes In The Balatonfelvidék Sandstone Formation At Csopak Village, Balaton Highland, Hungary. Acta Mineralogica-Petrographica, Abstract Series 5, Szeged, p54
      • Tapolcai Basin
        • Nemesgulács
Szakáll & Jánosi: Minerals of Hungary, 1995
Szakáll & Jánosi: Minerals of Hungary, 1995.
        • Uzsa (Uzsabánya)
"Giorgio Bortolozzi (visual identification)"
  • Zala Co.
    • Keszthelyi Mts
      • Cserszegtomaj
Koch: Minerals of Hungary, 1985
Iceland
 
  • Eastern Region
    • Suður-Múlasýsla
Volker Betz (1981) Famous Mineral Localities: Zeolites From Iceland and the Faeroe Islands. Mineralogical Record 12:5-26
  • Vestmannaeyjar archipelago (Westman islands)
    • Heimaey island
      • Heimaey
Balić-Žunić, T., Garavelli, A., Acquafredda, P., Leonardsen, E., & Jakobsson, S. P. (2009). Eldfellite, NaFe (SO4) 2, a new fumarolic mineral from Eldfell volcano, Iceland. Mineralogical Magazine, 73(1), 51-57.
    • Surtsey Island
Jacobsson et al (1992) Encrustations from Lava Caves in Surtsey, Iceland. A Preliminary Report: Surtsey Research Progress Report X: 73-78 Reykjevik, Iceland.
India
 
  • Andhra Pradesh
    • Visakhapatnam District
Rocks & Min.: 8:7.
  • Jharkhand
    • Singhbhum District
S. G. Tenainkai, A. G. Ugarkar, M. V. Koti and A. Mookherjee (1991) Copper-bearing clay minerals of the oxidized zone of the Rakha-Chapri Block, Singhbhum Copper Belt, India. Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences, 100, 13-30.
  • Maharashtra
    • Nashik District (Nasik District)
      • Sinnar
White (2008)
Indian Ocean
 
  • Ninety East Ridge (90° E Ridge; Indian Ridge)
    • D.S.D.P.
      • Leg 26
D. Besse et al. , Bell. Minéral. , 1981, 104, pp. 56-63.
Indonesia
 
  • Irian Jaya (New Guinea)
    • Papua Province
      • New Guinea
        • Carstensz Mts
          • Gunung Bijih District (Grasberg District)
Prendergast, K. (2003). Porphyry-related hydrothermal systems in the Estberg District, Papua, Indonesia (Doctoral dissertation, James Cook University).
    • Banten Province (Bantam Province)
[Precious Opal] Extra Lapis - English No. 10 Opal
  • Lesser Sunda Islands
    • Bali Province
[var: Opal-AN] Rod Martin personal collection
  • Sumatera Island (Sumatra Island)
    • Bengkulu Province (Benkoelen Province; Benkulen Province)
      • Rejang Lebong District (Rediang Lebong District)
Canadian Mineralogist Vol. 16, pp. 651-657 (1978)
Israel
 
  • Negev
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
  • Northern District (HaZafon District)
    • Central Jordan Valley
      • Beit She'an
  • Southern District (HaDarom District)
www.mineralmundi.com
Italy
 
  • Basilicata
    • Potenza Province
      • Melfi
        • Vulture Mount
"Giorgio Bortolozzi (visual identification)"
  • Calabria
    • Reggio Calabria Province
[var: Opal-AN] samples in Messina University and Ferdinando Giovine collection
[var: Opal-AN] Messina University collection Ferdinando Giovine collection
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Russo, M., 2006: I minerali di formazione fumarolica della grande eruzione vesuviana del 1906
    • Phlegrean Volcanic Complex
      • Naples Province
        • Phlegrean Fields
          • Pozzuoli
Pichler, H., (1970): Italienische Vulkangebiete II, Bornträger Berlin Stuttgart
  • Emilia-Romagna
    • Parma Province
      • Berceto
        • Corchia mine
ADORNI F., GUELFI F. (1997) - La miniera di Fe e Cu di Corchia, Berceto, Appennino Parmense. - Riv. Min. It., N. 3, 217-250.
Adorni F., Guelfi F. (1997) - La miniera di Fe e Cu di Corchia, Berceto, Appennino Parmense. - Riv. Min. It. N 3, 217-250.
      • Medesano
        • Sant'Andrea Bagni
Adorni, F., Tateo, F., Adorni, B. (2004): La melanoflogite di Case Montanini (S. Andrea Bagni, Medesano, Appennino parmense). Rivista Mineralogica Italiana, 28, 126-136.
Adorni, F., Tateo, F., Adorni, B. (2004): La melanoflogite di Case Montanini (S. Andrea Bagni, Medesano, Appennino parmense). Rivista Mineralogica Italiana, 28, 126-136.
  • Friuli-Venezia Giulia
    • Udine Province
      • Degano Valley
"Giorgio Bortolozzi (visual identification)"
  • Latium
    • Latina Province
      • Ponza Island
E. Passaglia et al. , Eur. Journ. Mineral. , 1995, 7, pp. 429-438.
    • Rome Province
Federico M., Gianfagna A. - Al, Ca and Fe3+ bearing opal pseudomorph after melilite in ejecta and lavas of the Alban Hills, Italy. pp. 149-157
De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol
      • Rome
        • Valleranello
"Giorgio Bortolozzi (visual identification)"
      • Sacrofano Caldera
        • Campagnano di Roma
Eur. J. Mineral. , 1993, 5, pp. 53-58.
      • Tolfa Mts District
        • Allumiere
Negretti,G.C.;Lombardi,G.;Morbidelli,L.:”Studio geopetrografico del complesso vulcanico tolfetano-cerite (Lazio).IV:Le manifestazioni vulcaniche acide del settore civitavecchiese tolfetano”,Quad.CNR,4,1-173 (1966).
I minerali del Museo Archeominerario "Klitsche de la Grange"Allumiere,Provincia di Roma.(2000)
    • Viterbo Province
      • Montalto di Castro
        • Pietra Massa Locality
[var: Opal-AN] Passaglia, E. & Turconi, B. (1982): Silicati ed altri minerali di Montalto di Castro - VT. Rivista Mineralogica Italiana, 4/1982, 97-110.
  • Liguria
    • Genova Province
      • Genova
        • Borzoli
Giuseppe Pipino - L'antica miniera di Monte Ramazzo e i suoi minerali - Rivista Mineralogica Italiana, Milano, vol. 8, fasc. 3, 1977
Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia.
      • Masone
Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia.
      • Ne
        • Graveglia Valley
"Giorgio Bortolozzi (visual identification)"
[MinRec 32:356]
"Giorgio Bortolozzi (visual identification)"
          • Reppia
Redazione (2005): Sistematica ligure: resoconto 2005. Notiziario di Mineralogia Ferrania Club, 19, 3-5.
      • Tiglieto
        • Olbicella
Cortesogno L., Lucchetti G., Penco A.M. - 1975 - Associazioni a zeoliti nel "Gruppo di Voltri" : caratteristiche mineralogiche e loro significato - rend. S.I.M.P. - Milano, vol. 31, n.2 pp. 673-710
    • La Spezia Province
      • Rocchetta Vara
probed by Balestra C.
    • Savona Province
      • Sassello
Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia.
  • Lombardy
    • Bergamo Province
Maida, F. (2002): Descrizione delle specie e varietà di minerali e loro ritrovamento nella Bergamasca. G.O.M. Gruppo Orobico Minerali - Novecento Grafico, Ed., Bergamo 82 pp. (geologic part by F. Pezzotta).
    • Sondrio Province
      • Valchiavenna
        • Chiavenna
Bedognè, F. (1991) I minerali dei differenziati acidi di Tanno (Val Chiavenna). Il Naturalista Valtellinese - Atti Mus. civ. Stor. nat. Morbegno, 2, 35-45.
        • Novate Mezzola
Ghizzoni, S. & Mazzoleni, G. (2005): Itinerari mineralogici in val Codera. Geologia Insubrica, Ed., Milano, 316 pp.
      • Valtellina
        • Grosio
          • Grosina Valley
[var: Opal-AN] Tabacchi C. (1974) - Pegmatiti della Val Grosina (Sondrio) in - Notizie del Gruppo Min. Lombardo, Milano, fasc.4, Dec. 1974 pp. 85-86 ; Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.
        • Malenco Valley
          • Chiesa in Valmalenco
    • Varese Province
      • Ceresio Valley
No reference listed
[var: Opal-AN] Fabio Brignoli collection
  • Marche
    • Macerata Province
Cingolani G. (1979) Antica ricerca di manganese di Monte San Vicino (Mc) - Rivista Mineralogica Italiana fasc. 3 pag. 84
  • Piedmont
    • Biella Province
De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol.
Piccoli, G. C., Maletto, G., Bosio, P., & Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo F. Eusebio - Alba, 607 pag.
        • San Paolo Cervo
- Martini, B., Salvetti, A., Dalla Fontana, G., Boscardin, M., Rocchetti, I., Ciriotti, M.E., Taronna, M., Ambrino, P. (2012). I minerali delle cave di sienite Colombari e Vej della Balma Valle Cervo (Biella, Piemonte). Micro, 10, 110-135
- Martini, B., Salvetti, A., Dalla Fontana, G., Boscardin, M., Rocchetti, I., Ciriotti, M.E., Taronna, M., Ambrino, P. (2012). I minerali delle cave di sienite Colombari e Vej della Balma Valle Cervo (Biella, Piemonte). Micro, 10, 110-135
    • Cuneo Province
      • Varaita Valley
        • Bellino
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    • Novara Province
      • Pella
[var: Opal-AN] Mariani P., Scaini G.: "I minerali d'Italia" - Rizzoli, 1978 - and A. Del Caldo, C. Del Moro, C.M. Gramaccioli, M. Boscardin M. "Guida ai Minerali" Fabbri ed. Milano, 1981
    • Torino Province
      • Canavese District
        • Baldissero Canavese
Marinai & Scaini,1978. I minerali d'Italia, Rizzoli Editore,Milano
      • Caselette
        • Musinè Mt.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
      • Casellette
Jervis, G. (1873): I tesori sotterranei dell'Italia. Vol. 1: Regioni delle Alpi. Ed. Loescher, Torino, 410 pp.
      • Casternone Valley
        • Givoletto
          • Mt. Baron
Fenoglio, M., Sanero, E., (1941): I giacimenti di magnesite delle Prealpi Piemontesi. Per. Mineral., 12, 83-111.
      • Lanzo Valleys
        • Balangero
Prete, R. (1995): L'amiantifera di S. Vittore, Balangero, Torino. Rivista Mineralogica Italiana, 4/1995, 313-333.
        • Viù Valley
          • Viù
Airaudi, D., Ambrino, P., Ciriotti, M.E., Blass, G. (2009). Baddelleyite in cristalli dalla rodingite del Malpass, Val di Viù, Piemonte. Micro (UK report), 2/2009, 100-111
      • Luserna San Giovanni
Ambrino, P., Brizio, P., Ciriotti, M.E., Finello, G., Marello, B. (2009). Minerali della pietra di Luserna. AMI. CD-ROM (in italian and in english)
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
      • Susa Valley
        • Bussoleno
          • Tignai
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): MInerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    • Verbano-Cusio-Ossola Province
      • Baveno
        • Oltrefiume
          • Mount Camoscio
[var: Opal-AN] [MinRec 14:157]
      • Omegna
- Albertini,C. (2000) : Ritrovamenti nel Rio Inferno, Brughiere di Omegna. Prima segnalazione nel granito di Baveno : uranofane-beta - Rivista Mineralogica Italiana, Milano, XXIV, 2, 88-92.
      • Ossola Valley
        • Antigorio Valley
          • Crodo
Mattioli V. (1979): Minerali Ossolani. Ed. Arti Grafiche Medesi, Milano, 268 pp.; Piccoli G.C., Maletto G., Bosio P., Lombardo B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" di Alba, Ed., Alba, 607 pp.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
[var: Opal-AN] De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol.
          • Premia
            • Premia gneiss quarries
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
        • Antrona Valley
          • Montescheno
Rivista Mineralogica Italiana, 23 (1), 42-49
        • Domodossola
          • Cosasca
[var: Opal-AN] De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol.
        • Vigezzo Valley
          • Craveggia
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
          • Trontano
Mattioli, V. (1976): Località mineralogiche consigliate: Rio Graja, Trontano, Valle Vigezzo. Notiziario del Gruppo Mineralogico Lombardo, 2/1976, 40-42
  • Sardinia
    • Cagliari Province
      • Capoterra
Olmi F., Sabelli C., Senesi F., Stara P., 2002. La mineralizzazione uranifera di Arcu su Linnarbu. Riv. Miner. Ital., 3: 148-169.
[var: Opal-AN] Conti-Vecchi G. Stara P. (1991) - Minerali della Sardegna - Edizioni Della Torre - Cagliari 276 pp
      • San Vito
        • Idda Mt.
Stara P., Astolfi M. (1990) - San Priamo - Rivista Mineralogica Italiana, fasc. 1, pp. 51-63
    • Carbonia-Iglesias Province
      • Iglesias
- Stara P., Rizzo R. e Tanca A.G. (1996) : Iglesiente e Arburese. Miniere e minerali. Vol. I (239 pagg.). EMSa Ed.
[var: Opal-AN] Chinellato Matteo and Michael C. Roarke collections
    • Olbia-Tempio Pausania Province
Gamboni, A. & Gamboni, T. (2006) - Gallura, Tesori nel Granito (i minerali delle pegmatiti granitiche) - J. Webber Ed,Sassari,190pp.
      • Arzachena
        • Mt. Mazzolu
• Gamboni, A., Cuccuru, S., Casini, L. & Marini, A. (2012)- I minerali del Monte Mazzolu, Cava Lu Patenti, Arzachena (OT), Sardegna. Rivista Mineralogica Italiana, 3/2012, 144-157.
S. Cuccuru, A. Gamboni & L. Casini (2011): The Mt. Mazzolu quarry: a new mineralogical locality. PLINIUS 37, 304.
      • Calangianus
- Gamboni, A., Gamboni, T., Pileri, P. (1997): Su alcuni minerali del massiccio granitico del monte Limbara zona "Furru e Conca", comune di Calangianus. Rivista Mineralogica Italiana, 2/1997, 123-134.
      • La Maddalena
Gamboni, A., Gamboni, T., Bucci, A. (1996): Ritrovamento di Bertrandite all’isola di Caprera, Arcipelago di La Maddalena. Rivista Mineralogica Italiana, 3/1996, 278-279
        • La Maddalena Island
Billows, E. (1941): I minerali della Sardegna ed i loro giacimenti. Sardegna Mineraria, Istituto per gli studi Sardi, Regia Università di Cagliari.
• Gamboni, A., Gamboni, T., Nonnis, O. (1997): I minerali dell'arcipelago di La Maddalena. Paolo Sorba, Ed., La Maddalena, 100 pp. ; Gamboni, A., Cuccuru, S., Gamboni, T. & Bargone, J. (2013). I minerali dell'isola di Spargi. Arcipelago di La Maddalena, Sardegna Nord Orientale. Rivista Mineralogica Italiana, 2/2013, 116-128.
      • Palau
Gamboni A., Gentile P., Mascia S., De Vito A., Gamboni T., 2004. Monte Canu: uranofane-beta e altri minerali delle pegmatiti granitiche. Riv. Miner. Ital., 3: 138-145
      • Sant'Antonio di Gallura
Gamboni, A., Gamboni, T. (1998) - Babingtonite e "Granati" delle pegmatiti granitiche della Gallura, Sardegna nord-orientale. Rivista Mineralogica Italiana, 4, Milano.
      • Telti
Gamboni, A., Gelosa, M., Gamboni, T. (2001): Ortoclasio ed altri minerali delle pegmatiti di S. Bachisio, Telti, Gallura, Sardegna N.E. Rivista Mineralogica Italiana, 1/2001, 30-40
      • Tempio Pausania
        • Giogantinu and Balistreri Peaks
Gamboni, A., Gamboni, T. (2006): Gallura, tesori nel granito, i minerali delle pegmatiti granitiche. Webber Editore, Sassari, 190 pp.
    • Oristano Province
- Conti-Vecchi, G. & Stara, P.(1991): Minerali della Sardegna, Della Torre Edizioni, Cagliari, 276 pp.
      • Mt. Arci
        • Masullas
"Giorgio Bortolozzi (visual identification)"
    • Sassari Province
[var: Opal-AN] Antonio Gamboni Collection
Gamboni, A., Cuccuru, S. & Carta, M. (2015) - I minerali della cava Funtanedda Ulumu, Ploaghe, Provincia di Sassari, Sardegna - Rivista Mineralogica Italiana, 1/2015,16-29.
Conti-Vecchi, G. & Stara, P. (1991) - Minerali della Sardegna - Della Torre Ed,276pp.
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
Russo, M. (2006): Il gesso delle valli del Faurdo e del Caolino (Isola di Lipari, Messina, Sicilia). Micro (notizie mineralogche), 2006, 51-54.
          • Vulcano Island
PANICHI U. (1924): Contributo allo studio dei minerali dell'Isola di Vulcano. - Memorie della Società Italiana delle Scienze (detta dei XL) - serie 3 – 19, 3-55.
            • Porto Levante
PANICHI U. (1913): Millosevichite, nuovo minerale del Faraglione di Levante, nell'Isola di Vulcano. - Atti R. Acc. Naz. Lincei - serie 5 - Rend. Cl. Sc. Fis. Mat. Nat. - 22, 5 , 303. PANICHI U. (1924): Contributo allo studio dei minerali dell'Isola di Vulcano. - Memorie della Società Italiana delle Scienze (detta dei XL) - serie 3 - 19, 3-55.
P.Forti, M.Panzica La Manna and A.Rossi (1994) The peculiar mineralogic site of the Alum cave (Vulcano, Sicily). Proceedings of the 7th International Symposium on Vulcanospeleology November 1994 p.35-44.
PANICHI U. (1924): Contributo allo studio dei minerali dell'Isola di Vulcano. - Memorie della Società Italiana delle Scienze (detta dei XL) - serie 3 - 19, 3-55. QUERCIGH E. (1935): Sul solfoselenio di Vulcano (Isole Eolie). - Rendiconti dell' Accademia delle Scienze Fisiche e Matematiche di Napoli - 32, 3-7. GARAVELLI C.L. (1958): Sulla natura del cosiddetto "solfoselenio" dell'isola di Vulcano. - Periodico di Mineralogia - 27, 1, 159-178.
    • Trapani Province
Jervis G. (1881): I tesori sotterranei dell'Italia. Vol. 3: Regioni delle Isole. Sardegna e Sicilia. Addenda ai precedenti volumi. Loescher, Torino, XXII+539 pp.; Jervis G. (1881): I tesori sotterranei dell'Italia. Vol. 3: Regioni delle Isole. Sardegna e Sicilia. Addenda ai precedenti volumi. Loescher, Torino, XXII+539 pp.
  • Trentino-Alto Adige
    • Trento Province
      • Lagorai Group
Ferretti, P., & Masetto, M. (2008). Cima d'Asta. Recenti ritrovamenti nelle pegmatiti del massiccio granitico (Trentino orientale). Rivista Mineralogica Italiana, 4/2008, 210-228.
      • Mocheni Valley
        • Pergine Valsugana
"Giorgio Bortolozzi (visual identification)"
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Lagarina Valley
        • Mt. Baldo
          • Ala
            • Pilcante
"Giorgio Bortolozzi (visual identification)"
      • Valsugana
        • Roncegno
Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
  • Tuscany
    • Florence Province
Brizzi G., Meli R., 1996. I minerali della formazione ofiolitica dell'Impruneta (FI). Riv. Miner. Ital., 20: 81-98.
Brizzi G., Meli R., 1996 - I minerali della formazione ofiolitica dell'Impruneta (FI). - Riv. Mineral. Ital., 20 1: 81-98.
    • Grosseto Province
      • Amiata Mt.
[var: Fiorite] No reference listed
    • Livorno Province
      • Campiglia Marittima
Biagioni, C., Orlandi, P., Gini, C., Bargellini, C., Gamucci, C., Marinai, V., Nannoni, R. (2013). Botro ai Marmi. I minerali delle miniere Maffei e Montorsi. Rivista Mineralogica Italiana, 1/2013, 63-83.
Nannoni, R., & Marinai, V. (2008). Monte Spinosa. Nuovi ritrovamenti alle miniere Maffei e Montorsi. Rivista Mineralogica Italiana, 2/2008, 98-111.
      • Elba Island
        • Campo nell'Elba
[var: Opal-AN] Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
[var: Opal-AN] Barsotti, G., & Nannoni, R. (2006). Rocce, minerali e miniere delle isole dell'Arcipelago Toscano. Pacini editore, 152 pp.
[var: Opal-AN] Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
        • Capoliveri
          • Cape Calamita Mine (Calamita Mine)
G. Cocco, C. Garavelli, 1954 - Studio di alcuni problemi geochimici relativi al giacimento di ferro di Capo Calamita (Elba) - Rend. Soc. Min. It., 10: 269-350.
        • Porto Azzurro
E. Manasse, 1912 - Ricerche petrografiche e mineralogiche sul Monte Arco (Isola d'Elba) - Atti Soc. Tosc. Sc. Nat., Mem. Serie A, 28:118-199.
        • Rio Marina
Barsotti, G., & Nannoni, R. (2006). Rocce, minerali e miniere delle isole dell'Arcipelago Toscano. Pacini editore, 152 pp.
      • Livorno
Sartori F. (1967) - La wolchonskoite di Castiglioncello (Livorno). Per. Mineral., Roma, 36, 103-124.
Ref.: Sammartino F., "Minerali miniere e cave dei Monti Livornesi", Comune di Livorno, 2009.
    • Lucca Province
      • Apuan Alps
        • Vergemoli
          • Fornovolasco
• Biagioni, C., Orlandi, P., & Bonini, M. (2008). Fornovolasco. Storia e minerali delle miniere di ferro presso Vergemoli (Alpi Apuane). Rivista Mineralogica Italiana, 4/2008, 230-252
      • Garfagnana
        • Villa Collemandina
Barsanti M., 1989. "I granati di Villa Collemandina". Tesi di laurea inedita, Università di Pisa
    • Pisa Province
      • Monteverdi Marittimo
        • Canneto
Nannoni, R., Capperi, M., 1989. Miniere e minerali della Val di Cecina. Gruppo Mineralogico Cecinese. Tip. Grafiche Favillini, Livorno.
      • Pomarance
Brizzi G., Meli R. (1988) - Le pietre silicee della Fattoria di Monterufoli (PI) - Rivista Mineralogica Italiana, Milano, fasc. 3, pp. 101-110
      • Volterra
Orlandi P., (2005). "Geositi minerari e mineralogici della provincia di Pisa" in La geologia della provincia di Pisa. Cartografia, geositi e banche dati, pp. 55-280, Provincia di Pisa, 2005
Orlandi P., (2005). "Geositi minerari e mineralogici della provincia di Pisa" in La geologia della provincia di Pisa. Cartografia, geositi e banche dati, pp. 55-280, Provincia di Pisa, 2005
    • Siena Province
      • Murlo
        • Pompana
R. Meli (1999): I minerali del Fosso della Chiesa, Murlo (Siena) - Riv. Mineral. Ital., 23, 2: 103-105
  • Umbria
    • Perugia Province
      • Spoleto
Stoppa F., Scordari F., Mesto E., Sharygin V.V. and Bortolozzi G. - Calcium-aluminium-silicate-hydrate "cement" phases and rare Ca-zeolite association at Colle Fabbri, Central Italy (2010). Centr.Eur.J.Geosci. 2 (2), pag. 175-187 .
  • Veneto
    • Padova Province
      • Euganei Hills
        • Faedo
"Giorgio Bortolozzi (visual identification)"
    • Vicenza Province
      • Cornedo Vicentino
        • Spagnago
Lapis, 15 (12), 27-32+50.
      • Laghi
Boscardin M., Daleffe A., Rocchetti I., Zordan A. “I minerali nel Vicentino”, Museo “G. Zannato”, Montecchio Maggiore (Vicenza), 2011.
      • Montecchio Maggiore
        • San Pietro
"Giorgio Bortolozzi (visual identification)"
      • Tonezza del Cimone
"Giorgio Bortolozzi (visual identification)"
Japan
 
  • Hokkaido
    • Iburi Province
      • Soubetsu-cho (Sobetsu-cho)
Takeo Kato, Takeo Watanabe, Akira Nakamoto (1934) On the sulphur deposits associated with iron sulphide ore, found in the Quaternary Formation of Japan. Japan Journal of Geology and Geography, 15, 3-4, 287-324.
    • Kushiro Province
      • Akan National Park
        • Atosanupuri volcano (Iou-zan; Mount Iwo)
Katsui, Yoshio (1962) Explanatory text of the Geological map of Japan, scale 1:50,000 - Kutcharo-ko (Abashiri-60), Abstract.
    • Okhotsk Subprefecture (Abashiri Province)
      • Kitami City
Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
    • Tokachi Province
      • Ashoro-cho (Asyoro-tyo)
Suzuki, J. et al (1957) Journal of the Faculty of Science, Hokkaido University, Ser. 4, 9, 501-518.
  • Honshu Island
    • Chubu Region
      • Gifu Prefecture
        • Mizunami City
specimens in several Japanese museums and private collections
        • Nakatsugawa City
[var: Opal-AN] Alfredo Petrov collection.
[var: Opal-AN] Alfredo Petrov collection
      • Ishikawa Prefecture
        • Enuma-gun
Chishitsu Chousajo (1902)
        • Komatsu City
Ryoichi SADANAGA and Michiaki BUNNO (1974) THE WAKABAYASHI MINERAL COLLECTION Bulletin No. 7 The University Museum, The University of Tokyo
Ryoichi SADANAGA and Michiaki BUNNO (1974) THE WAKABAYASHI MINERAL COLLECTION Bulletin No. 7 The University Museum, The University of Tokyo
Hiroaki Tano specimens
[var: Menilite] Hiroaki Tano's specimen, and it's known in the Noto Area for many years
      • Nagano Prefecture
        • Chino City
H. Minato (1953) Koubutsugaku Zasshi, 1, #2, 67
      • Niigata Prefecture
        • Osudo
Takahisa Yoshimura & Yujin Ishizuka (1989) Ferrierite in a hydrothermal alteration zone around the murakami sericite deposit. Journal of the Clay Science Society of Japan (in Japanese); 29:179-186
      • Shizuoka Prefecture
        • Shimoda City
          • Rendaiji
(unpublished species lists maintained by local collectors; needs confirmation)
      • Toyama Prefecture
        • Kami-Niikawa-gun
Chishitsu Chousajo (1902)
      • Yamanashi Prefecture
Chishitsu Chousajo (1902)
    • Chugoku Region
      • Hiroshima Prefecture
        • Hiroshima City
[var: Opal-AN] alfredo petrov specimens
      • Okayama Prefecture
        • Katsuyama
          • Teragohchi
H. Momoi (1964) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 15, #1, 65-72.
[var: Hyalite] Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
    • Kanto region
      • Chiba prefecture
        • Minamiboso city
H. Imai collection
      • Gunma Prefecture
Mineralogical Journal Vol. 20 (1998) , No. 1 pp 1-8
      • Ibaraki Prefecture
        • Makabe-gun
          • Makabe-machi
[var: Opal-AN] Alfredo Petrov specimens, received from Colorstone Mithrill, Tokyo.
    • Kinki region
      • Mie Prefecture
        • Ise City
Kimura, T. & Nampei, H. (1982) Geoscience Magazine, 32, 153-160.
      • Nara Prefecture
Geology and Mineral Resources of Japan (Geological Survey of Japan, 1960)
      • Shiga Prefecture
        • Otsu City
[var: Opal-AN] Nakatsugawa Mineral Museum (Gifu Prefecture, Japan)
        • Ritto City
Hiroaki Tano's collection
    • Tohoku Region
      • Akita Prefecture
        • Yuzawa
          • Ogachi
T. Nakanishi, E. Izawa, K. Watanabe (2003) Mineralogical and Geochemical Characteristics of Siliceous Sinter in Japan. Proceedings 25* NZ Geothermal Workshop 2003 pp155-160.
      • Aomori Prefecture
        • Goshogawara City
Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
      • Fukushima Prefecture
        • Date
Chishitsu Chousajo (1902)
Masutomi Museum specimen (Kyoto)
Chishitsu Chousajo (1902)
      • Iwate Prefecture
        • Kunohe-gun
          • Noda-mura
Watanabe, T. (1959) Mineralogical Journal, 2, 6, 408-421
Takeo Kato, Takeo Watanabe, Akira Nakamoto (1934) on the sulphur deposits associated with iron sulphide ore, found in the Quaternary Formation of Japan. Japan Journal of Geology and Geography, 15, 3-4, 287-324.; Iichiro Takahashi (1957) Studies on the Sulphur and Iron-Sulphides Deposits of the Matsuo Mine (2). Mining Geology 7:104-111
      • Miyagi Prefecture
Seki, Y. and Okumura, K. (1968) Yugawaralite from Onikobe active geothermal area, Northeast Japan. Jour. Japan. Assoc. Min. Pet. Econ. Geol., 60, #1, 27-33.
        • Zao-machi
[var: Diatomite] Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
      • Yamagata Prefecture
        • Tsuruoka City
          • Atsumi-cho
Mizota (1969) Ganseki-Koubutsu-Koshogaku Zasshi, 62, 329-338.
  • Kyushu Region
    • Fukuoka prefecture
      • Tagawa-gun
        • Kawara
[var: Opal-AN] Uehara, S., et al. (2014) Minerals from Kyushu and Yamaguchi. (Fukuoka Mineral Club, 355 pages)
    • Kagoshima Prefecture
      • Hishikari mine (Hishikari gold mine)
Fulin Zhang, Chengmo Jin, and Qiyun Qing (1986): Geology and Prospecting 22(6), 9-12
      • Kirishima City
        • Makizono
Alfredo Petrov collection
    • Nansei Archipelago
      • Kagoshima Prefecture
        • Mishima village
S. Hamasaki (2002) Earth Planets Space 54, 217-229.
Amir Akhavan Collection
S. Hamasaki (2002) Earth Planets Space 54, 217-229.
Amir Akhavan Collection
    • Saga Prefecture
      • Karatsu City (Higashi-Matsuura-gun)
        • Hizen-cho
[var: Opal-AN] Miyawaki R, Matsubara S, Yokoyama K, Iwano S, Hamasaki K, Yukinori I (2003) Kozoite-(La), La(CO3)(OH), a new mineral from Mitsukoshi, Hizen-cho, Saga Prefecture, Japan. Journal of Mineralogical and Petrological Sciences 98, 137-141
[var: Opal-AN] Miyawaki, R., Matsubara, S., Yokoyama, K., Takeuchi, K., Terada, Y., & Nakai, I. (2000). Kozoite-(Nd), Nd (CO3)(OH), a new mineral in an alkali olivine basalt from Hizen-cho, Saga Prefecture, Japan. American Mineralogist, 85(7-8), 1076-1081.
        • Kyuuragi-machi
Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
  • Shikoku Island
    • Kochi Prefecture
Kaneko, K. (1956) Symposium sobre yacimientos de manganeso. Vol. 4, 184 (Mexico, 1956)
  • Tokyo Metropolis
    • Izu Archipelago
Alfredo Petrov - field observations, 4-2014
[var: Opal-AN] field collected by Alfredo Petrov, 12-2011
    • Ogasawara Islands
      • Chichijima Group
        • Chichi Island (Chichijima)
Mineralogical Journal Vol. 11 (1982) , No. 1 pp1-14
Mineralogical Journal Vol. 11 (1982) , No. 1 pp1-14
    • Volcano Islands (Kazan Rettou)
      • Iou Island (Iou-to; Iwo-Jima; Iwojima; Iou-jima; Naka-Iou-jima)
Gordon A. MacDonald (1948) Petrography of Iwo Jima. Bulletin of the GSA, 59, 1009-1018.
Kazakhstan
 
  • Almaty Province (Almaty Oblysy; Almati Oblast')
    • Chu-Ili Mts
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
  • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
    • Balkhash Region (Balqash; Karatas; Prebalkhashie)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    • Betpakdala Desert (Bet-Pak-Dal Desert)
Ermilova, L. P. & Senderova, V. M. (1961): Betpakdalite, a new mineral from the oxidation zone of the wolframite ore deposit of Karaoba (Central Kazakhstan). Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 90, 425-430. (in Russian) ; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    • Karkaralinsk Rayon
      • Karkaralinsk (Qarqaraly; Karsakpaj; Qarsaqpaj; Kaskelen)
Pavel M. Kartashov data
    • Zhana-Arkinskii rayon
Gems of Kazakhstan, - textbook, Almaty, 1999, v.1, pp. 71-73 (in Rus.)
[var: Fire Opal] Oleg Lopatkin collection
Kenya
 
  • Rift Valley Province
    • Suswa Volcano
Forti, P. et al. (2004), "Minerogenesis of volcanic caves of Kenya". Int. J. Speleol. 32, 3-18
Kosovo
 
[var: Chrysopal] Vik Vanrusselt collection
    • Cikatovo
Mineral deposits and mining districts of Serbia Compilation map and GIS databases, 2002, J. Monthel, P. Vadala, J.M. Leistel, F. Cottard with the collaboration of M. Ilic, A. Strumberger, R. Tosovic, A. Stepanovic, March 2002 BRGM/RC-51448-FR
    • Glavika
Mineral deposits and mining districts of Serbia Compilation map and GIS databases, 2002, J. Monthel, P. Vadala, J.M. Leistel, F. Cottard with the collaboration of M. Ilic, A. Strumberger, R. Tosovic, A. Stepanovic, March 2002 BRGM/RC-51448-FR; Buletini i Shkencave Gjeologjike 2012
Madagascar
 
  • Antananarivo Province
    • Vakinankaratra Region
      • Antsirabé 2 District
        • Vinaninkarena Commune
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
      • Antsirabé City
[var: Opal-AN] Knut Edvard Larsen collection # M-190
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
      • Sahatany Pegmatite Field (Mt Ibity area)
        • Manandona Valley
Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de Doctorat de l`Universite Paul Sabatier, Toulouse
        • Sahatany Valley
Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de doctorat de L'Universite Paul Sabatier, Toulouse
Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de Doctorat de l`Universite Paul Sabatier, Toulouse
  • Fianarantsoa Province
    • Amoron'i Mania Region
      • Ambatofinandrahana District
        • Mandrosonoro Commune
          • Ambatovita
Knut Eldjarn specimen & photo
        • Mangatabohangy Commune
Pezzotta, F. (1996): Mangatobangy. Amethyst-Zepter aus Madagascar. Lapis 21 (9), pp 32-35
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Geologique A. 1871
      • Ambositra District
        • Manandriana Commune
          • Ambatofangehana
Lacroix, A. (1899): Matériaux pour la Minéralogie de Madagascar. IV. Brochantite d'Ambatofangehana (Province d'Ambositra). Bulletin du Muséum national d'histoire naturelle 5 : 318-319
    • Atsimo-Atsinanana Region
      • Befotaka Sud District
        • Marovitsika Sud Commune
          • Bemia
[var: Fire Opal] Simoni, M., Caucia, F., Adamao, I. & Galinetto, P. (2010): New occurrence of fire opal from Bemia, Madagascar. Gems & Gemmology. 46 (2), 114-121
  • Toamasina Province (Tamatave)
    • Alaotra-Mangoro Region
      • Ambatondrazaka District
        • Ambatosoratra Commune
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
  • Tuléar Province (Toliara)
    • Androy Region
      • Ambovombe District
        • Andalantanosy Commune
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
      • Tsiombe District (Tsihombe)
        • Tsiombe Commune
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
    • Anosy Region (Fort Dauphin Region)
      • Amboasary District
        • Behara Commune
Michel Arliguie photo and specimen
Eliana Intruglio's mineral collection
      • Betroka District
        • Benato-Toby Commune
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
        • Mahasoa East Commune
Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. 624p. (p.558-561)
    • Southwestern Region
      • Betioky District
        • Lazarivo Commune
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Malaysia
 
  • Borneo Island
    • Sarawak
Yajima, S. (1960). Metacinnabar from Sarawak and Japan, with Reference to Its Stability Relations to Cinnabar. Mineralogical Journal, 3(1), 9-18.
Mineralogical Magazine (1983): 47: 79-80.
Mali
 
  • Kayes Region
    • Cercle de Nioro du Sahel
Mars
 
  • Oxia Palus quadrangle
Gornitz, V. (2008) Mineral News, 24, #9, 1-2.
  • Valles Marineris
Bishop, J. L., et al. (2009), Mineralogy of Juventae Chasma: Sulfates in the light-toned mounds, mafic minerals in the bedrock, and hydrated silica and hydroxylated ferric sulfate on the plateau, J. Geophys. Res., 114, E00D09, doi:10.1029/2009JE003352, [printed 115(E2), 2010].
Mexico
 
  • Baja California (Baja California Norte; BC Norte)
    • Mun. de Tijuana
      • Tijuana
[var: Fire Opal] Rob Lavinsky
  • Baja California Sur (BC Sur)
    • Mun. de Mulegé
RODRIGUEZ-DIAZ, Augusto Antonio et al. Metallogeny of the Santa Rosa manganese deposit, Baja California Sur, Mexico. Bol. Soc. Geol. Mex [online]. 2010, vol.62, n.1, pp. 141-159
  • Chihuahua
    • Mun. de Aldama
Peter Megaw collection
Cross, B. & Culp Zeitner J. (2006), Geodes Natures Treasures, P.23
      • Peña Blanca District
        • Sierra Peña Blanca
Econ Geol (1991) 86:233-248
http://www.swri.org/4org/d20/ghs/PBlanca/mineral.html; Econ Geol (1991) 86:233-248; Schindler, M. et al. (2010): Geochim. Cosmochim. Acta 74, 187-202.; Othmane, G., Allard, T., Menguy, N., Morin, G., Esteve, I., Fayek, M., & Calas, G. (2013). Evidence for nanocrystals of vorlanite, a rare uranate mineral, in the Nopal I low-temperature uranium deposit (Sierra Peña Blanca, Mexico). American Mineralogist, 98(2-3), 518-521.
Mineralium Deposita, 44 (2009) 363-370
  • Coahuila
    • Mun. de Cuatrociénegas
      • Cuatro Ciénegas (Cuatrociénegas de Carranza; Venustiano Carranza)
        • Limestone caves
[var: Opal-CT] Forti, P. et al. (2006): ACTA CARSOLOGICA 35/1, 79–98.
    • Mun. de Sierra Mojada
      • Sierra Mojada
[var: Opal-AN] Panczner(1987):228-286.
  • Durango
[AmMin 85:263]
    • Mun. de Coneto de Comonfort
      • América-Sapioris District (Potrillos)
        • Sierra de San Francisco
          • Potrillos
[var: Opal-AN] Yves Masson photo
      • Coneto de Comonfort
No reference listed
    • Mun. de Durango
      • Cerro de los Remedios
        • Victoria de Durango
[var: Opal-AN] No reference listed
    • Mun. de Mapimí
J.Hyrsl (2012) Gemstones of Peru, p. 62
    • Mun. de Mezquital
      • Mezquital
[var: Wood Opal] Panczner (1987): 286.
  • Guanajuato
    • Mun. de Cuerámaro
      • Cuerámaro
[Precious Opal] Panczner(1987):286.
    • Mun. de Pénjamo
      • Pénjamo
[Precious Opal] Panczner(1987):287.
    • Mun. de Santa Catarina
      • Santa Catarina
        • Cerro de las Fajas
Panczner (1987): 287.; Am Min (1955) 40 (1-2), 64-69
  • Hidalgo
    • Mun. de Zimapán
[var: Fire Opal]
Panczner(1987): 93-396.
  • Jalisco
    • Mun. de Magdalena
      • La Amazata
[Precious Opal] Panczner(1987):287.
[Precious Opal] Panczner(1987):287.
[var: Fire Opal]
[Precious Opal] Panczner (1987): 287.
[Precious Opal] Panczner (1987): 287.
      • San Andrés
[Precious Opal] Panczner(1987): 288.
      • San Simón
[Precious Opal] Panczner(1987):288.
[Precious Opal] Panczner (1987): 288.
    • Mun. de San Cristóbal de la Barranca
      • El Salvador
[Precious Opal] Panczner(1987):288.
[Precious Opal] Panczner(1987):288.
  • Mexico
    • Mun. de Temascaltepec
      • Temascaltepec de González (Temascaltepec)
Camprubi, A., Canals, A., Cardellach, E., Prol-Ledesma, R.M., Rivera, R., 2001, The La Guitarra Ag-Au low-sulfidation epithermal deposit, Temascaltepec district, Mexico: vein structure, mineralogy, and sulfide-sulfosalt chemistry. Society of Economic Geologists Special Publication, v. 8, p. 133-158.
  • Michoacan
    • Uruapan del Progreso (Uruapan)
[var: Opal-CT] Fritsch, E., Gaillou, E., Ostroumov, M., Rondeau, B., Devouard, B., Barreau, A. (2004) Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru. European Journal of Mineralogy, 16, 743-752
  • Nayarit
    • Mun. de Jalisco
      • La Curva
[Precious Opal] Panczner(1987):288.
    • Mun. de La Yesca
      • La Yesca
Panczner(1987):288.
  • Puebla
    • Mun. de Ixtacamaxtitlán
      • Ixtacamaxtitlán
Tritlla J., Morales J.M., Camprubí A., Iriondo A., Corona-Esquivel R., González-Partida E., Levresse G., and Carrillo-Chávez A. A 2004. The ixtacamaxtitlan kaolinite deposit and sinter (Puebla state, Mexico): a magmatic-hydrothermal system telescoped by shallow paleoaquifer. Geofluids, 4, 4, 329.
[var: Mexican Fire Opal]
    • Mun. de Amealco
      • Amealco
[Precious Opal] Panczner (1987): 288.
[var: Mexican Fire Opal]
    • Mun. de Ezequiel Montés
      • Ezequiel Montés
[Precious Opal] Panczner(1987):289.
    • Mun. de Tequisquiapan
      • La Trinidad
Rob Lavinsky
[var: Opal-AN] No reference listed
[var: Opal-AN] Cook, R.B. (2013) Connoisseur's Choice: Buergerite (Fluor-buergerite) Mexquitic, San Luis Potosi, Mexico. Rocks & Minerals, 88, #5, 442-446.
    • Mun. de Villa de Arriaga
[var: Opal-AN] various added photos
  • Sonora
    • Mun. de Moctezuma
      • Moctezuma
Carles Curto specimen
  • Zacatecas
[var: Opal-AN] Van King
      • El Copetillo
Christiansen, E. H., Sheridan, M. F., and Burt, D. M., 1986, The Geology and Geochemistry of Cenozoic Topaz Rhyolites from the Western United States, GSA Special Paper 205, 82 p.
Mongolia
 
  • Dornogovi Aimag
Pavel M. Kartashov data
  • Gobi Desert
Kynicky, J., Chakhmouradian, A.R., Xu, C., Krmicek & Galilova, M. (2011): Distribution aand evolution of zirconium mineralization in peralkaline granites and associated pegmatites of the Khan Bogd Complex, southern Mongolia. Canadian Mineralogist. 49, 947-965.
Morocco
 
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
FAVREAU G. & DIETRICH J.E. (2006) Tachgagalt (Maroc), Le Cahier des Micromonteurs, 93, 37-71. (in French)
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Aït Ahmane
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Namibia
 
  • Erongo Region
[var: Opal-AN] MinRec, Jan/Feb 2001
    • Karibib District
[var: Opal-AN] E. Schnaitmann, F. Brandstätter, U. Kolitsch and G. Niedermayr (2008): Die „Gitterquarz“-Paragenese aus dem Erongo, Namibia. Mineralien-Welt 20 (1), 55-63.
      • Spitzkopje Area
Cairncross, B. (2005) Famous Mineral Localities: Klein Spitzkoppe, Namibia. Mineralogical Record 36(4) 317-335
[var: Opal-AN] Schnaitmann, E. A., Nägele, H., Niedermayr, G., Brandstätter, F. & Jahn, S. (2007): Das Metazeunerit-Pocket auf Tubussis 22, Erongo. Mineralien-Welt 18 (2), 33-43. (in German)
      • Usakos
No reference listed
Natural History Museum Vienna collection
    • Omaruru District
      • Omaruru
Jahn, S. & Bast, R. (2006): Der Krantzberg bei Omaruru, Namibia, und die Mineralvorkommen in seiner Umgebung. Mineralien-Welt 17 (3), 32-48.
  • Karas Region
    • Karasburg District
      • Warmbad
        • Orange River
[var: Opal-AN] Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 386 pp. (in English)
  • Khomas Region
    • Gamsberg Area
Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 668 pp. (in English)
    • Windhoek District
      • Aris
Wartha, R., Palfi, A., Niedermayr, G., Brandstätter, F. and Petersen, O. V. (2001): Der Aris-Phonolith-Komplex und seine Mineralien. In Bahmann, U. and A. (Eds.), Namibia – Zauberwelt edler Steine und Kristalle, Bode-Verlag, Haltern, Germany, pp. 172-179. (in German)
  • Kunene Region
[var: Opal-CT] Saphira Minerals specimens, Munich Show 2014
New Caledonia
 
  • Northern Province
Briggs, R. M. (1975). Structure, metamorphism and mineral deposits in the Diahot region, northern New Caledonia (Doctoral dissertation, ResearchSpace@ Auckland).
Briggs, R. M. (1975). Structure, metamorphism and mineral deposits in the Diahot region, northern New Caledonia. Thesis (PhD-Geology), University of Auckland, 1975.
    • Houaïlou Commune
Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
    • Poya North Commune
Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
  • Southern Province
    • Yaté Commune
Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
New Zealand
 
  • Kermadec Islands
de Ronde, C.E.J.; Hannington, M.D.; Stoffers, P.; Wright, I.C.; Ditchburn, R.G.; Reyes, A.G.; Baker, E.T.; Massoth, G.J.; Lupton, J.E.; Walker, S.L.; Greene, R.R.; Soong, C.W.R.; Ishibashi, J.; Lebon, G.T.; Bray, C.J.; Resing, J.A. 2005 Evolution of a submarine magmatic-hydrothermal system : Brothers volcano, southern Kermadec arc, New Zealand. Economic geology, 100(6): 1097-1133
  • Mayor Island (Tuhua)
NZJGG, 2003, 46: 581-590. NZJGG, 1991, 34: 337-340. NZJGG, 1981, 24: 449-467
NZJGG, 2003, 46: 581-590. NZJGG, 1991, 34: 337-340. NZJGG, 1981, 24: 449-467
  • North Island
    • Auckland
      • North Shore City
        • Lake Pupuke
[var: Opal-AN] Rod Martin personal collection
[var: Opal-AN] Collection of RJ Martin
    • Bay of Plenty
Schwarz-Schampera, U.,et al. (2007) Cruise Report SONNE 192/2, MANGO. Marine Geoscientific Research on Input and Output in the Tonga-Kermadec Subduction Zone
      • Rotorua
Brian Jones and Robin W. Renaut Growth of siliceous spicules in acidic hot springs, Waiotapu geothermal area, North Island, New Zealand Palaios(October 2006), 21(5):406-423
R.MARTIN, K.A.RODGERS, P.R.L.BROWNE The nature and significance of sulphate-rich, aluminous efflorescences from the Te Kopia geothermal field, Taupo Volcanic Zone, New Zealand. Mineralogical Magazine, June 1999, Vol. 63(3), pp. 413-419
    • Manawatu-Wanganui
      • Tongariro National Park
Johnstone, R. D. 1979, Fumarole Incrustations and Some Aspects of the Thermal Alteration at Ketetahi, Mount Tongariro, New Zealand. Geothermal Institute, University of Auckland, New Zealand
[var: Opal-AN] The Ngatamariki Geothermal Field, NZ: Surface Manifestations - Past and Present. Brotheridge, J.M.A. Browne, P.R.L. Hochstein, M.P. Proceedings 17th NZ Geothermal Workshop 1995 p61
    • Northland
      • Kaipara
Mason, B. (1957): Larnite, scawtite, and hydrogrossular from Tokatoka, New Zealand. American Mineralogist 42, 379-392.
      • Puhipuhi
Gary Leske specimen, 1984.
Aurora Minerals, 2005, PROSPECTING PERMIT 39 270 HAZELBROOK, NORTHLAND NEW ZEALAND ANNUAL REPORT, Ministry of Economic Development New Zealand Unpublished Petroleum Report MR4188
[var: Opal-AN] Judy Rowe and Alfredo Petrov specimens
    • Waikato
      • Taupo
        • Atiamuri
Collection of Rod Martin
[var: Opal-AN] Rod Martin personal collection
        • Orakeikorako Thermal Area
Rod Martin, Minerals of Ruatapu Cave, Orakei Korako, Taupo Volcanic Zone. Essence of Microscope (NZ)
        • Wairakei
Zeolites of the World, Rudy W. Tschernich 1992
      • Thames-Coromandel
        • Tairua
          • Tairua River
R. Martin. Tairua Essence of Microscope, 2009
  • South Island
    • Canterbury
[var: Opal-AN] Judy Rowe Collection
    • Otago
[var: Opal-AN] Knut Edvard Larsen collection # MM- 3930 (collected by Dick Dufton)
[var: Opal-AN] Judy Rowe collection
      • Oamaru
[var: Opal-AN] Old Mill or Dog Pound Quarry, Oamaru, Essence of Micro-Scope (NZ), Auton and Thornton
      • Waitaki
[var: Opal-AN] Judy Rowe Collection
Norway
 
  • Akershus
    • Asker
Stensrud, S. (2004): Mineralfunn i ny sikkerhetstunnel i Vardåsen og langs ny gangvei langs Heggedalsveien i Asker i 2002-2003. Norsk Bergverksmuseum Skrift 28: 76-102
Stensrud, S. (2004): Mineralfunn i ny sikkerhetstunnel i Vardåsen og langs ny gangvei langs Heggedalsveien i Asker i 2002-2003. Norsk Bergverksmuseum Skrift 28: 76-102
    • Eidsvoll (Eidsvold)
      • Minnesund
Kvamsdal, L.O., Eldjarn, K. (2006): Mineralene i smaragdgruvene ved Byrud gård, Minnesund, Norge. STEIN 33 (4), 4-20
    • Nittedal
L. O. Kvamsdal (1998): Mineralene fra Nordmarkitt og Grefsensyenitt i Oslofeltet. AS Merkur-Trykk, Oslo(in Norwegian), p. 22.
  • Aust-Agder
    • Iveland
      • Frikstad
[var: Opal-AN] Revheim, O. (2004): Gadolinitt-(Y) og andre mineraler fra Slobrekka. Norsk Bergverksmuseum Skrift 28: 43-50
  • Buskerud
    • Drammen
      • Drammensmarka
Berg, H.-J. (198?): Myrseter-Landfall. Turguide. (unpublished collectors guide)
Nordrum, F.S. & Larsen, A.O.(1999): Einige neue Mineralfunde aus dem Gebiet Drammen-Holmestrand in Norwegen. MineralienWelt 10 (6):57-61
[var: Opal-AN] Nordli, Ø. (1997): Ny E 134 Drammen- Nedre Eiker. Mineraler fra veiutbyggingen. STEIN 24 (3), 116-121
    • Hurum
[var: Opal-AN] Knut Edvard Larsen MM-collection (#1089)
    • Nedre Eiker
      • Nedre Eiker Church
Raade, G. (1969): Contribution to the Mineralogy of Norway, No 40. Cavity minerals from the permian biotite granite at Nedre Eiker Church. Norsk Geologisk Tidskrift 49, 227-239.
  • Nordland
    • Hamarøy
      • Finnøy
Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
  • Oppland
    • Lunner
      • Nordmarka
Raade, G. & Haug, J.(1982): Gjerdingen. Fundstelle seltener Mineralien in Norwegen. LAPIS 7, 9-15
      • Øståsen
        • Surka
Kvamsdal, L.O. (1993): Noen mineraler fra nordmarkitten mellom Roa og Maura. STEIN 20 (1), 30-45
  • Oslo
    • Grorud
      • Bånkall
Kvamsdal, L.O. (1998): Mineralene fra Nordmarkitt og Grefsensyenitt i Oslofeltet. AS Merkur-Trykk, Oslo. 72p
Kvamsdal, L. O. (1999): Mineralene fra Huken pukkverk i Oslo. STEIN 26 (4), 14-47
  • Sogn og Fjordane
    • Jølster
Larsen, K.E. & Nordrum, F.S. (2013): Noen funn av mineraler i Norge 2012-2013. Norsk Bergverksmuseum Skrift. 50, 111-117
  • Sør-Trøndelag
    • Oppdal
[var: Opal-AN] Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og steinsenter. Unpublished paper. http://vinstradalen.no/pdf/Mineraler.pdf
[var: Opal-AN] http://www.strahlen.org/vp/no/bjornaa/
[var: Opal-AN] Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og Steinsenter. Unpublished paper. http://vinstradalen.no/pdf/Mineraler.pdf
[var: Opal-AN] Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og steinsenter. Unpublished paper. http://vinstradalen.no/pdf/Mineraler.pdf
      • Trollheimen Mts
[var: Opal-AN] Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og steinsenter. Unpublished paper. http://vinstradalen.no/pdf/Mineraler.pdf
  • Telemark
    • Drangedal
      • Tørdal
Raade, G. & Kristiansen, R. (2000a): Mineralogy and geochemistry of the Heftetjern granite pegmatite, Tørdal: a progress report. Norsk Bergverksmuseum Skrifter. 17, 19-25
    • Kragerø
      • Valberg
Peter Andresen observation oct.2003
    • Porsgrunn
      • Eidanger
        • Bergsbygda
Svein A.Berge observation on collected materiale august 2012
    • Skien
Jamtveit B., Dahlgren S. and Austrheim H. (1997): High-grade contact metamorphism of calcareous rocks from the Oslo Rift, Southern Norway. American Mineralogist. 82 : 1241 - 1254
  • Vestfold
    • Holmestrand
      • Fjordveien
[var: Opal-AN] Nordrum, F.S. (2012): Noen funn av mineraler i Norge 2011-2012. Norsk Bergverksmuseum Skrifter. 49, 117-124
L. O. Kvamsdal (1998): Mineralene fra Nordmarkitt og Grefsensyenitt i Oslofeltet. AS Merkur-Trykk, Oslo (in Norwegian), p. 24.
[var: Opal-AN] Nordrum, F.S., Larsen, S. Bergstrøm, T & Larsen, A.O. (1997): Mineralfunn langs ny E 18 i Drammen og Nordre Vestfold. STEIN 24 (3), 102-110
    • Larvik
      • Hedrum
[var: Opal-AN] Larsen, K. E. & Andersen, F. (2009): Mineralforekomster i den østlige delen av Siljan-Hvarnes plutonkompleks, sørvestre Vestfold. Norsk Bergverksmuseums Skrift, 41: 54-63
        • Farris
S. A. Berge
      • Malerød
Andersen, F., Berge, S.A. & Burvald, I. (1996): Die Mineralien des Langesundsfjords und des umgebenden Larvikit-Gebietes, Oslo-Region, Norwegen. Mineralien-Welt 7(4), 21-100
      • Pauler
Field observarions by Peter Andresen, 2010.
Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineral.16. p.15
      • Tvedalen
Engvoldsen,T.,Andersen, F.,Berge, S.A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1),15-71
Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp.
    • Re
      • Ramnes
Andersen, F. & Berge, S. A. (1994): Himberg pukkverk, Ramnes, Vestfold. STEIN 21 (2), 96-102
    • Sande
      • Selvik
[var: Opal-AN] Nordrum, F.S. (2012): Noen funn av mineraler i Norge 2011-2012. Norsk Bergverksmuseum Skrifter. 49, 117-124
    • Sandefjord
      • Fokserød
Berge, S.A. & Larsen,A.O.(1980): Mineraler fra Sandefjordsområdet-IV.Granater".NAGS-nytt 7(2),21-24. (in norwegian)
      • Haneholmveien
[var: Opal-AN] Larsen, K. E. & Kolitsch, U. (2012): An unique mineral suite in a syenite pegmatite at Virikkollen, Sandefjord, Larvik Plutonic Complex, Norway. Norsk Bergverksmuseum Skrifter. 49, 35-44
      • Råstad
Engvoldsen,T.,Andersen, F.,Berge, S.A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1),15-71
      • Vesterøya
Berge, S.A., Larsen, K.E. & Andersen, F. (2011): Buer, Vesterøya, Sandefjord- en typelokalitet for et nytt mineral. Norsk Bergverksmuseum Skrift. 46: 49-56
Berge, S. A. (2013):Mineralene i Husebyyåsen feltspatbrudd, Vesterøya, Sandefjord. Norsk Bergverksmuseum Skrifter. 50, 93-99
Engvoldsen,T., Andersen, F., Berge, S. A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18 (1),15-71
    • Svelvik
[var: Opal-AN] Larsen, S. & Bergtsrøm, T. (2004): Svelvik- Topas. STEIN 31(4), 11
[var: Opal-AN] Nordrum, F.S. (2007): Nyfunn av mineraler i Norge 2006-2007. STEIN 34 (2): p.15-16
Oman
 
Pacific Ocean
 
  • Bismarck Sea
New Data on Minerals (2004): 39: 91-98
  • East Pacific Rise
Econ Geol (1985) 80:221-249
  • Kermadec-Tonga trench
A. G. Reyes, C.E.J. DE Ronde, and C. W. R. Soong (2004) a Submarine Magmatic-hydrothermal System at Brothers Volcano, Kermadecs. Proceedings 26th NZ Geothermal Workshop pp 46-52
  • Sea of Japan
    • Honshu Island borderland
Markov, Y.D., Mozherovskii, A.V., Derkachev, A.N., Barinov, N.N., and Sereda, N.A. (2002): Lithology and Mineral Resources 37(2), 121-129.
  • South California Borderland
[var: Opal-CT] Hein, J.R., Reid, J.A., Conrad, T.A., Dunham, R.E., Clague, D.A., Schulz, M.S., and Davis, A.S. (2010): USGS Open-File Report 10-1069
Pakistan
 
  • Gilgit-Baltistan (Northern Areas)
    • Baltistan
      • Skardu District
        • Braldu Valley
[var: Hyalite] Ikram Mineralogy
        • Haramosh Mts.
[var: Opal-AN] Jose Zendrera specimen
Panama
 
  • Veraguas Province
Byington, C.B. and Russell, M.R., 2001, Economic geology and ore controls of the Santa Rosa Mine – An integrated structural analysis approach, Canazas, Veraguas, Republic of Panama: Society of Economic Geologists Special Publication 8, p. 318-329.
Papua New Guinea
 
  • Milne Bay Province
    • D'Entrecasteaux Islands
      • Fergusson Island (Moratau)
Province, M. B., & Guinea, P. N. (2004). Technical Report On The Fergusson Property.
Province, M. B., & Guinea, P. N. (2004). Technical Report On The Fergusson Property.
  • Morobe Province
Econ Geol (1984) 79:638-655
  • New Ireland Province
    • Lihir Island area
http://www.portergeo.com.au/tours/pacificgold99/pg99m1.asp#lihir
Paraguay
 
  • Central
    • Asuncion
Alfredo Petrov field observations, 1989.
Peru
 
  • Arequipa Department
    • Caraveli Province
J.Hyrsl (2012) Gemstones of Peru, p. 56
Hyrsl & Rosales (2003), Min. Record 34:254
  • Ayacucho Department
J.Hyrsl (2012) Gemstones of Peru, p. 57
  • Cajamarca Department
    • Cajamarca Province
Rob Lavinsky specimen
[var: Opal-CT] Dill, H.G., Bosse, H.-R., Henning, K.-H., Fricke, A., and Ahrendt, H. (1997): Mineralium Deposita 32, 149-163.
  • Ica Department
    • Ica Province
      • Ica
[var: Opal-AN] Extra Lapis - English No. 10 Opal
    • Pisco Province
J.Hyrsl (2012) Gemstones of Peru, p. 57
    • Pisco Umay
  • Puno Department
    • Titicaca Lake
Jacques Valverde self collecting (summer 2007); Jacques Valverde self collecting (summer 2007)
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Gogołów-Jordanów Massif
[var: Opal-AN] Szełęg, E., Galuskina, I. 2010: Mineralogy of Lower Silesia, Poland. Acta Mineralogica-Petrographica, Field Guide Series, Vol. 17, 1–15.
      • Sobótka
[var: Opal-AN] DUBIŃSKA E., 1995: Rodingites of the eastern part of Jordanów-Gogołów serpentynite massif, Lower Silesia, Poland. Can. Mineral., 33, 585-608.GALUSKIN E., SZEŁĘG E., 2003: The first finding of Ag-amalgamates in rodingites (Nasławice, Lower Silesia, Poland). Mineralogical Society of Poland - Special Papers, Vol. 22.
    • Ząbkowice District
Michael W. Kieron collection
Alfredo Petrov specimen
Spangenberg, K., and Müller, M. (1949): Contributions to Mineralogy and Petrology 1(5/6), 560-572.
Spangenberg, K., and Müller, M. (1949): Die lateritische Zersetzung des Peridotits bei der Bildung der Nickelerzlagerstätte von Frankenstein in Schlesien. Contributions to Mineralogy and Petrology 1(5/6), 560-572
  • Opolskie
[var: Wood Opal] Kornaga Collection
  • Podkarpackie
    • Błażowa
[var: Menilite] Personally collected by Zając Piotr in 2013
[var: Prase Opal] Bauer & Bouska, 1983. Precious & Semi-precious Stones
Portugal
 
  • Aveiro District
    • Albergaria-a-Velha
      • Branca
[var: Opal-AN] Marques de Sá, J. & Leal Gomes, C. (2010): Les mines de cuivre et nickel de Palhal et Telhadela, Albergaria-a-Velha, Aveiro, Portugal. Le Règne Minéral, 92, 36-47.
  • Azores District
Museu Nacional de História Natural e da Ciência, Lisboa, colecção António Bello.
  • Beja District
    • Serpa
      • Vale de Vargo
[var: Opal-AN] pedro alves collection
Rui Nunes
    • Macedo de Cavaleiros
Rui Nunes collection
Rui Nunes collection
  • Castelo Branco District
    • Vila Velha de Rodão
      • Tostão
        • Ingadanais Mines
[var: Opal-AN] Martins da Pedra collection
  • Évora District
    • Estremoz
      • Glória
[var: Opal-AN] Rui Nunes collection 2012
  • Guarda District
    • Aguiar da Beira
      • Gradiz
[var: Opal-AN] Pedro Alves collection
    • Almeida
      • Malpartida
[var: Opal-AN] Felix Garcia Garcia Mineral Collection
  • Leiria District
    • Alvaiázere
      • Pelmá
[var: Diatomite] LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1890Diatomito
    • Bombarral
      • Roliça
[var: Diatomite] Direcção Geral de Minas
[var: Diatomite] Rui Nunes
      • São Pedro
[var: Diatomite] Rui Nunes 2012
  • Portalegre District
Rui Nunes 2011
[var: Opal-AN] Rui Nunes 2011
    • Nisa
      • Santana
Martins da Pedra collection
  • Santarém District
[var: Diatomite] Rui Nunes 2011
      • Rio Maior
[var: Diatomite] Rui Nunes 2011
  • Setúbal District
    • Barreiro
      • Palhais
[var: Diatomite] LNEG - Siorminp
    • Grândola
      • Melides
[var: Diatomite] LNEG - Siorminp database information
  • Viana do Castelo District
    • Valença do Minho
      • Sanfins
[var: Opal-AN] Pedro Alves collection; Nuno Afonso collection (XRD-analysed)
  • Viseu District
    • Mangualde
      • Chãs de Tavares
[var: Opal-AN] Rui Nunes collection
      • Quintela de Azurara
[var: Opal-AN]
    • Sátão
      • Ferreira de Aves
        • Aldeia Nova
[var: Opal-AN] Van King
      • Romãs
[var: Opal-AN] Nuno Afonso collection
[var: Opal-AN] Pedro Alves collection
      • Vila Longa
[var: Opal-AN] Pedro Alves collection
Réunion Island
[var: Mascareignite] [Hey p438]
[var: Opal-AN] collection Joachim Esche
Romania
 
  • Covasna Co.
Zoltán Csata
  • Hunedoara Co.
    • Deva
Carpathian Journal of Earth and Environmental Sciences, October 2010, Vol. 5, No. 2, p. 89 - 99
No reference listed
[var: Milk Opal] Primics, G. (1886): Das Vorkommen der derben Quarzvarietäten bei Tekerő. Földtani Közlöny, 16, 347-353.
  • Maramureș Co.
    • Șișești Commune
      • Dănești village
Marinel Kovacs, Alexandrina Fülöp, 2003, Neogene volcanism in Gutâi Mts., (Eastern Carpathians). A Review. Studia Universitatis, Babeș-Bolyai, Geologia, vol.48, 2003, p.3-16
      • Șurdești village
Jude Radu (2010). An overview of the Oaș and Gutâi Neogene Metallogenetic District. Romanian Journal of Mineral Deposits, Mineral Resources of Carpathians area. 10th-12th September 2010, Baia Mare, Romania. vol 84, p.94-95
Dana, E., 1892, System of Mineralogy.
Russia
 
  • Central Region
    • Kurskaya Oblast'
      • Kursk Manet Anomaly group
Tsekhovskii, Y.G., Lavrushin, V.Y., Kuleshov, V.N., Shchepetova, E.V., Stukalova, I.E., Nosik, L.P., Prokof’ev, V.Y., and Areshin, A.V. (2002): Lithology and Mineral Resources 37(3), 210-227.
    • Moscow Oblast' (Moskovskaya Oblast')
[var: Opal-AN] Pekin, A. (2011) Minerals of Moscow. Russian Journal of General Chemistry. Jun2011, Vol. 81 Issue 6, p1381-1391.
Pekin, A. (2011) Minerals of Moscow. Russian Journal of General Chemistry. Jun2011, Vol. 81 Issue 6, p1381-1391.
Pekin, A. (2011) Minerals of Moscow. Russian Journal of General Chemistry. Jun2011, Vol. 81 Issue 6, p1381-1391.
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
Garrett, Donald E. (1998) Borates. Handbook of Deposits, Processing, Properties, and Use.
    • Sakha Republic (Saha Republic; Yakutia)
[World of Stones 12:49]
      • Polar Yakutia
        • Alazeya river basin
Igor Savin data
  • Far-Eastern Region
    • Kamchatka Oblast'
[Der Aufschluss 1995:4 p163-180]
[Der Aufschluss 1995:4 p.163-180]
Karpov, G. A. (1991). Complex mercury-antimony-arsenic mineralization of the Uzon-Waiotapu type in modern hydrothermal systems. International Geology Review, 33(6), 599-611.; Kyle, J. E., Schroeder, P. A., & Wiegel, J. (2007). Microbial silicification in sinters from two terrestrial hot springs in the Uzon Caldera, Kamchatka, Russia. Geomicrobiology Journal, 24(7-8), 627-641.
    • Magadanskaya Oblast'
      • Kolyma River Basin
        • Ducat District
          • Omsukchan
Filimonova, L.G., and Trubkin, N.V. (2008): Geology of Ore Deposits 50(2), 135-144.
    • Primorskiy Kray
      • Kavalerovo Mining District
[MinRec 32:8]
Dobrovol’skaya, M.G., Genkin, A.D., Bortnikov, N.S., and Golovanova, T.I. (2008): Geology of Ore Deposits 50(1), 75-85.
    • Sakhalinskaya Oblast'
      • Kuril Islands
        • Iturup Island
          • Bogatyr' Range
Znamenskii V.S., Lebedev L.M., Sidorenko G.A. (1970) On molybdenite from middle-cretaceous volcanic rocks of Iturup island (Kuril Islands), - DAN USSR, v.193, N4, pp. 898-901 (in Rus.).
        • Kunashir Island
L.M. Lebedev data
  • Northern Caucasus Region
    • Stavropol'skiy Kray
      • Pyatigorsk
        • Lermontovskoe U Deposit
          • Beshtau Mt.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
        • Lovozero Massif
          • Alluaiv Mt
Pavel M. Kartashov data
Pavel M. Kartashov analytical data (2013)
          • Kedykverpakhk Mt
Mineralogical Record: 36(4): 397-416.
          • Seidozero Lake
Yakovenchuk, V.N., Pakhomovsky, Ya.A., Men’shikov, Yu.P., Mikhailova, J.A., and Ivanyuk, G.Yu. (2007): Canadian Mineralogist 45, 451-456.
  • Povolzhsky Region
    • Samaraskaya Oblast' (Samara Oblast')
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Ekaterinburg (Sverdlovsk)
          • Berezovskii (Berezovskii Zavod)
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
        • Magnitogorsk
          • Sakhara District (Sakharinskii)
            • Sakhara massif
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
        • Plast
          • Kochkar' District
            • Svetlyi
Pavel M. Kartashov analytical data
      • Orenburgskaya Oblast'
        • Orsk
          • Khalilovskii District
            • Khabarninskii massif
Sharkov, A.A. (2009): Lithology and Mineral Resources 44(1), 19-35.
            • Khalilovskii massif (Khalilova)
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
        • Svetlyi
          • Buruktal District
[var: Prase Opal] Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
  • Western-Siberian Region
[Mineralien Welt 6/92:62]
Rwanda
 
  • Western Province
    • Gatumba District
Daltry, V.D.C. and O. von Knorring (1998) Type-Mineralogy of Rwanda with Particular Reference to the Buranga Pegmatite. Geologica Belgica 1:1-9
Saudi Arabia
 
  • Mintaqah Makkah
Saudi Geological Survey Open-File Report SGS-OF-2004-12, 68 p.
Slovakia
 
  • Banská Bystrica Region
    • Banská Bystrica Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
      • Banská Bystrica (Neusohl)
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
Koděra, M. a kol.: Topografická mineralogie Slovenska. Sv. 3 Sed-Ž, Bratislava, Veda 1990, s. 1273-5.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
      • Hrochoť
[var: Milk Opal] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
      • Ľubietová (Libetbánya; Libethen)
[var: Opal-AN] Mesiarkinová M. & Ozdín D., 2009: Study of hydrothermal SiO2 mineralization on the locality Ľubietová - Jamešná (Slovakia). Mitt. Österreich. Mineralog. Gesellschaft, 155, p. 101.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
      • Poniky
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Ďuďa R., 1996: Slovenské opály. Minerál,Brno, IV, 4, 254 - 258
[var: Opal-AN] Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
    • Banská Štiavnica Co.
      • Banská Belá
Koděra M., Andrusovová-Vlčeková G., Belešová O., Briatková D., Dávidová Š., Fejdiová V., Hurai V., Chovan M., Nelišerová E., Ženiš P., 1986-1990: Topografická mineralógia Slovenska. I-III. Veda, Bratislava, 1592 p. (in Slovak)
[var: Opal-AN]
Lexa, J., Štohl, J., and Konečný, V. (1999): Mineralium Deposita 34, 639-654.
S.ŠIMKO
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Lexa, J., Štohl, J., and Konečný, V. (1999): Mineralium Deposita 34, 639-654.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    • Brezno Co.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Detva Co.
[var: Opal-AN] Koděra, M., Andrusovová-Vlčeková, G., Belešová, O., Briatková, D., Dávidová, Š., Fejdiová, V., Hurai, V., Chovan, M., Nelišerová, E., Ženiš, P. (1986-1990): Topografická mineralógia Slovenska. I-III. Veda, Bratislava, 1592 p.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Ivanov M. (1979): Genéza mangánových rudných výskytov medzi Detvou a Hriňovou. Geol. Práce, Správy, 73,173-186.
Rojkovičová,Ľ., 1982: Rudná mineralizácia v Javorí. Min.Slovaca, 14,5,461 – 470
    • Krupina Co.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
      • Hontianske Nemce
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Lučenec Co.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    • Revúca Co.
      • Sirk
Grecula,P. et al., 1995: Ložiska nerastných surovín Slovenského rudohoria. Zväz.1, Bratislava, 834 s
    • Veľký Krtíš Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Žarnovica Co.
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
      • Nová Baňa
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
      • Žarnovica
[var: Wax Opal] Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    • Žiar nad Hronom Co.
      • Banská Štiavnica Mining District
        • Vyhne
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Wood Opal] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Ďuďa R., 1993 : Die mineralien der Gold und Silber - lagersttäte von Kremnitz ( Kremnica) in der Slowakei. Mineralien Welt /Haltern,Nemecko/,5, s. 20 - 32
Daniel Ozdín collection
[var: Wood Opal] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
    • Zvolen Co.
      • Lešť
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
  • Bratislava Region
    • Pezinok Co.
      • Pezinok
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[MinRec 31:153-162]
  • Košice Region
    • Gelnica Co.
      • Gelnica (Göllnitz)
Pauliš P., Ďuďa R., 2002: Nejzajimavejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 134p.
    • Košice - okolie Co.
[var: Opal-AN] Pauliš P., Ďuďa R., 2002: Nejzajimavejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 134p.
    • Košice Co.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Pauliš P., Ďuďa R., 2002: Nejzajimavejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 134p.
    • Michalovce Co.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    • Rožňava Co.
[var: Opal-AN] Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
Ozdín D. & Števko M., 2010: Unikátny výskyt achátov v serpentinizovaných peridotitoch v Dobšinej. Minerál, 18, 4, 331-335.
      • Kečovo
Cílek V., 1999: Mineralogické výskumy v jeskyni Domica. Aragonit, 4, 9 – 11
      • Ochtiná (Achten)
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Sobrance Co.
[var: Opal-AN] Bacsó,Z.,Ďuďa,R.,1988: Metalogenéza a rudné formácie rudného poľa Remetské Hámre. Min.Slovaca,Bratislava, 3, 193-220p
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Matúš Škutka
    • Spišská Nová Ves Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    • Trebišov Co.
[var: Opal-AN] Pauliš P., Ďuďa R., 2002: Nejzajimavejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 134p.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Kaličiak, M., Ďuďa, R., 1996: Geolgický vývoj, stavba a metalogenéza neovulkanitov na Východnom Slovensku. Manuskript, Archív Geofond, Bratislava, 83p
  • Nitra Region
    • Levice Co.
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Wood Opal] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Albert Russ specimens
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
      • Veľký Ďur
[var: Wood Opal] Wood Opals From Velky Dur,Mineral no.3,2006,Illasova and Turnovec
  • Prešov Region
    • Kežmarok Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Poprad Co.
      • Hôrka
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
      • Poprad
Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    • Prešov Co.
      • Červenica
[var: Onyx Opal] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
[var: Opal-AN] Personally collected by S.Šimko in 1994
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
      • Vyšná Šebastová
Ďuďa,R., et al., 1981: Mineralógia severnej časti Slanských vrchov. Min.Slovaca, Monografia 2, 98s
[var: Opal-AN] Duda et. all.,1981:Minerály severnej časti Slanských vrchov. Min.Slovca,Monografia 2,Bratislava, 98 p
    • Snina Co.
[var: Opal-AN] Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
    • Stará Ľubovňa Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Vranov nad Topľou Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
      • Juskova Voľa
Duda et all.,:Mineralógia severnej časti Slanských vrchov. Min.Slovaca,Monografia 2,Bratislava, 98 p
[var: Opal-AN] Ďuďa,R., et al., 1981: Mineralógia severnej časti Slanských vrchov. Min.Slovaca, Monografia 2, 98s
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
  • Trenčín Region
    • Prievidza Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
[var: Opal-AN] Slavomír Šimko
[var: Wood Opal] S.Šimko
Gabriel Gajarsky specimen
  • Trnava Region
    • Trnava Co.
      • Smolenice
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
  • Žilina Region
    • Dolný Kubín Co.
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    • Liptovský Mikuláš Co.
      • Malužiná
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
      • Partizánska Lupča
[var: Opal-AN] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    • Turčianske Teplice Co.
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
Somaliland
 
Wolfgang Hampel specimen
  • Jodha
[Precious Opal] Journal of Gemmology, 28:81-84 (2002).
South Africa
 
  • KwaZulu-Natal Province
    • Ugu District
Minerals of South Africa
  • Limpopo Province
    • Bushveld Complex
      • Waterberg District
        • Naboomspruit (Mookgophong)
[var: Opal-AN] Wolfgang R. Windisch personal list.
    • Vhembe District
      • Soutpansberg (Zoutpansberg)
Minerals of South Africa
  • Mpumalanga Province
    • Ehlanzeni District
      • Barberton
        • Bon Accord
Am Min 54 (1969), 1204-1208
      • Nelspruit
Martini, J.E.J. et al (1997), "Mbobo Mkulu Cave, South Africa", in "Cave Minerals of the World" (1997)
  • North West Province
    • Bojanala Platinum District
      • Western Bushveld Complex
        • Pilanesberg Alkaline Complex
Minerals of South Africa
  • Northern Cape Province
    • Kalahari manganese field
      • Black Rock
Am Min 53:495
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) pp 289.
    • Namakwa District (Namaqualand)
      • Henkries
[var: Diatomite] Eriksson, P.G. (1997): Mineralium Deposita 32, 419-422.
    • Orange River
Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, p 228;
Minerals of South Africa
South Korea
 
  • Gangwon-do (Kangwon-do; Gang'weondo)
    • Chongson-gun
      • Tong-myon
        • Hwaam-ni
Kinosaki, Y. (1941) Journal of the Mineralogical Society of Korea, 24, 5.
Spain
 
  • Andalusia
    • Almería
      • Bayarque
Propuestas para explotación de mineral de mercurio en la Península Ibérica. Datos complementarios para la investigación en el S.E.", ITGE (Madrid, 1968)
      • Cuevas del Almanzora (Cuevas de Vera)
Josep Sanchez LaFuente (INTAN) specimens
      • Níjar
Joaquim Mollfulleda, Minerales, Omega, 1996
    • Granada
      • Galera
[var: Menilite] FMF Forum
    • Málaga
      • Mijas
Romero Silva JC (2003) Minerales y Rocas de la provincia de Malaga. 318 pp. Published by CEDMA Malaga County Council. Spain
  • Aragón
    • Teruel
      • Loscos
Calvo, M. (2008) Minerales de Aragón. Prames (Zaragoza) 463 pages
    • Zaragoza
      • Morés
        • Purroy
Calvo, M. (2008) Minerales de Aragón. Prames (Zaragoza) 463 pp
  • Canary Islands
    • Las Palmas Province
[Precious Opal] Extra Lapis - English No. 10 Opal
        • Agaete
María Jesús Mediavilla collection
        • Anden Verde
Mullis, J., and Sigl, F. (1982) Die Entstehungsgeschichte von Opal, Chalcedon und Quarz von Gran Canaria. Schweizer Strahler, 6,155-176.
        • Las Palmas de Gran Canaria
[var: Opal-AN] Alex Hansen Machín (2009). Volcanología y geomorfología de la etapa de rejuvenecimiento plio-pleistocena de Gran Canaria (Islas Canarias). Tesis doctoral. Personally collected in January 2013
[var: Opal-AN] Graetsch, H. and I. Topalovic-Dierdorf: MAS NMR spectra of hyalite from Gran Canaria. Chemie der Erde. 56: (1996).387-391. 770
- Ternes, B. (1995): Fundstellen im Südwesten Gran Canarias. Lapis 20 (1), 57-59 (in German).
        • Tasarte
[var: Opal-AN] Zeolite collcetion of Volker Betz
    • Santa Cruz de Tenerife Province
      • Tenerife
        • Santa Cruz de Tenerife
          • Anaga Mts.
Journal of Non-Crystalline Solids 323 (2003) 27–33
  • Castile-La Mancha
    • Albacete
[var: Menilite] Juan Miguel Casanova Honrubia information
      • Hellín
INTAN (Barcelona) and Stefan Schorn specimens
[var: Menilite] MTI Mineralogía Topográfica Ibérica, 2009
    • Ciudad Real
[var: Opal-AN] Martins da Pedra collection
        • Bolaños de Calatrava
JRGL collection
  • Castile and Leon
    • Zamora
Jordi Fabre
  • Catalonia
    • Barcelona
      • Barcelonès
        • Barcelona city
Carles Curto Mila collection
      • Maresme
        • Tordera
[var: Opal-AN] Marc C collection
      • Vallès Occidental-Baix Llobregat
        • Sant Cugat del Vallès-El Papiol
      • Vallès Occidental
        • Montcada i Reixac
Mineralogistes de Catalunya (1997), VII (1): 34-55
      • Vallès Oriental
        • Aiguafreda
Bareche, E. (2005) "Els minerals de Catalunya. Segle XX" Grup Mineralògic Català, Barcelona, 269 pages
        • Sant Fost de Campsentelles
Laura Palacios Pérez, Minerals i roques, Pòrtic Natura, 2003
    • Girona (Gerona)
      • Alt Empordà
Joaquim Mollfulleda, Minerales, Omega, 1996
      • La Selva
        • Caldes de Malavella
Laura Palacios Pérez, Minerals i roques, Pòrtic Natura, 2003
        • Maçanet de la Selva
Martí Rafel - Dr. Joan Viñals;
        • Osor
        • Sils
          • Massabè
Joaquim Mollfulleda, Minerales, Omega, 1996
    • Tarragona
      • Priorat
        • Bellmunt del Priorat
Joan Abella i Creus (2008): Minerals I Mines De La Conca De Bellmunt Del Priorat.
  • Galicia
    • A Coruña (La Coruña)
      • Santa Comba
Carlos J. Rodríguez
    • Pontevedra
      • Ponteareas
Calvo, M., Viñals, J. and Vila, F. (2009) Mineralogy of the pegmatites and miarolitic cavities in the granitic batholit of Porriño, Pontevedra, galicia, Spain. Mineral Up, (2009-1), 6-23
      • Porriño
Calvo, M., Viñals, J. and Vila, F. (2009) Mineralogy of the pegmatites and miarolitic cavities in the granitic batholit of Porriño, Pontevedra, galicia, Spain. Mineral Up, (2009-1), 6-23
  • Madrid
Garcia G., Gonzalez C., Bueno A. (2004) - Cadalso de los Vidrios (Madrid), Bocamina, n° 14, pp: 12-46.
    • Fuenlabrada
Geominero Museum Collection
- González del Tánago, J., Lozano, R.P. and González del Tánago Chanrai, J. Plutón de La Cabrera. Pegmatitas graníticas y alteraciones hidrotermales. Bocamina, 2008, (21), pags. 15-85.
Tanago, J. G., Lozano, P. L., Larios, A. , La Iglesia, A. (2012) Stokesite crystals from La Cabrera, Madrid, Spain. Mineralogical Record 43:499-508
    • Valdemanco
- González del Tánago, J., Lozano, R.P. and González del Tánago Chanrai, J. Plutón de La Cabrera. Pegmatitas graníticas y alteraciones hidrotermales. Bocamina, 2008, (21), pags. 15-85
Collection of the Geominero Museum of Madrid
- González del Tánago, J., Lozano, R.P. and González del Tánago Chanrai, J. Plutón de La Cabrera. Pegmatitas graníticas y alteraciones hidrotermales. Bocamina, 2008, (21), pags. 15-85
- González del Tánago, J., Lozano, R.P. and González del Tánago Chanrai, J. Plutón de La Cabrera. Pegmatitas graníticas y alteraciones hidrotermales. Bocamina, 2008, (21), pags. 15-85
  • Murcia
    • Cartagena
      • La Aljorra
Sevillano, G. C., Viñals,J., Rebollar, M.C (2009): Minerales de las Vesículas de las Rocas Lamproíticas del afloramiento de La Aljorra (Murcia). Macla (11), 43-44
      • Sierra Minera de Cartagena-La Unión
        • Llano del Beal
FMF Forum
    • La Unión
      • Sierra Minera de Cartagena-La Unión
        • La Fortuna
[var: Opal-AN]
        • La Peraleja
[var: Opal-AN]
        • Sancti Spiritu
FMF Forum
  • Valencian Community
    • Valencia
      • Barxeta
Casanova Honrubia, Juan Miguel & Canseco Caballé, Manuel, 2002, Minerales de la Comunidad Valenciana : 237 p. Ed. Caja de Ahorros del Mediterráneo. Alicante
Sweden
 
  • Lappland
No reference listed
  • Skåne
    • Kristianstad
      • Osby
Swedish Nat.Museum
  • Värmland
    • Filipstad
Rocks & Min.: 63:456; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
  • Västmanland
    • Nora
      • Timansberg
Kjell Gatedal
Switzerland
 
  • Bern
    • Hasli Valley
      • Grimsel area
        • Oberaar lake area
          • Triebten lake (Trübten lake)
[var: Opal-AN] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 291.
[var: Opal-AN] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 291.
  • Grischun (Grisons; Graubünden)
    • Albula Valley
      • Oberhalbstein (Surses; Sursass)
        • Tinizong (Tinzen)
[var: Opal-AN]
    • Medel Valley
[var: Opal-AN] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 291.
  • Ticino (Tessin)
    • Leventina
      • Fiesso
[var: Opal-AN] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 291.
    • Lugano lake
      • Carona
[var: Opal-AN] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 291.
    • Riviera
      • Bellinzona
[var: Opal-AN] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 58
  • Vaud (Waadt)
    • Lavey-les-Bains
[var: Opal-AN] Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
  • Wallis (Valais)
    • Binn Valley
[var: Hyalite] Gorsatt, A. (Ed.) (2014): Die besten Seiten des Binntals. Mineraliensuche - Alpenblumen - Ortsgeschichten. KristalloGrafik Verlag, Achberg, Deutschland, 344 pp.
[var: Opal-AN] Cuchet, S., van der Burgt, A. und Meisser, N. (2005): Chummibort, eine neue Fundstelle für Arsenmineralien im Binntal. Schweizer Strahler, Nr. 2, 19-29. (in German/French)
      • Kriegalp Valley (Chriegalp Valley)
[var: Opal-AN]
[var: Hyalite] Schwanz, J. (1994): Das Binntal und seine Mineralien. - Hrsg. und Verlag André Gorsatt, Binn. 271 pp.
    • Martigny
      • Mont Chemin
[var: Opal-AN]
Tanzania
 
  • Arusha Region
    • Dumbawanga District
http://www.ganoksin.com/borisat/nenam/tanzania-mines.htm
  • Dodoma Region
Schmetzer, K., Berdesinski, W. Krupp, H. (1976) Grüner Opal aus Tansania. Aufschluss: 27, 381-384.
John A. Jaszczak collection
  • Tanga Region
Thailand
 
  • Nakhon Ratchasima Province (Khorat Province)
    • Nakhon Ratchasima District
[var: Opal-Agate] C. Lemanski, Jr. (visited, collected & photographed).
Togo
 
  • Plateaux Region
    • Haho Prefecture
      • Mont Haïto
        • Kpoté
Wolfgang Hampel (2013)
Tonga
 
Schwarz-Schampera, U.,et al. (2007) Cruise Report SONNE 192/2, MANGO. Marine Geoscientific Research on Input and Output in the Tonga-Kermadec Subduction Zone
Turkey
 
  • Aegean Region
    • Izmir Province
[var: Fire Opal] KARACIK, ZEKİYE; GENÇ, S. CAN; ESENLİ, FAHRİ; GÖLLER, GÜLTEKIN. (2011) he Gümüldür Fire Opal: Mode of Occurrence and Mineralogical Aspects. Turkish Journal of Earth Sciences. Jan/Feb2011, Vol. 20 Issue 1, p99-114.
    • Kütahya Province
      • Murat Dagi
Econ Geol (1989)84:780-787
Econ Geol (1989)84:780-787
Econ Geol (1989)84:780-787
      • Pazarla
[var: Opal-CT] Mutlu, H., Sariiz, K., and Kadir, S. (2005): Ore Geology Reviews 26, 39-50.
Esenli, F., Kumbasar, I., Eren, R. H., & Uz, B. (2001). Characteristics of opals from Simav, Turkey. Neues Jahrbuch fur Mineralogie-Monatshefte, (3), 97-113.
  • Central Anatolia Region
    • Ankara Province
[var: Opal-CT] Temel, A., Akdag, N., and Varol, E. (2010): Goldschmidt Conference Abstracts 2010.
    • Eskişehir Province
Ferdinando Giovine specimen
  • Eastern Anatolia Region
    • Erzurum Province
      • Kop Daglari
Mineralien Welt 2001 02 p.53
  • Marmara Region
    • Balikesir Province
      • Bigadiç
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
        • Faraşköy (Faraş)
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
      • Mumcu
Oygür, V. (1997). Anatomy of an epithermal mineralization: Mumcu (Balikesir-Sindirgi), Inner Western Anatolia, Turkey. Mineral Research Exploration Bulletin, 119, 29-39.
      • Susurluk
        • Sultançayırı (Sultan Tschair)
[var: Opal-CT] CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, 9:1-27.
    • Bursa Province
      • Mustafa Kemalpafla
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
U.S. Virgin Islands
 
  • St Croix
Am Min 50:752
UK
 
  • England
    • Cornwall
      • Callington District
        • Calstock
          • Gunnislake
Weiss, S., Green, D.H., Hooper, J.J. & Elton, N. (2007): Erzgänge und "alpine " klüfte: Die Mineralien des Hingston Quarry, Calstock, Cornwall. LAPIS 32 (11), 13-25
      • Camborne - Redruth - St Day District
        • Camborne
          • Grenville United Mines
Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.
          • North Roskear
Hall, T.M. (1868): Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
          • South Roskear group (Pendarves Consols)
Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.
        • Carharrack
          • Wheal Damsel United Mines
Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 191; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
        • Gwennap
          • St Day United Mines (Poldice Mines)
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
        • Redruth
Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.
          • Wheal Buller and Beauchamp
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
      • Mount's Bay District
[var: Opal-Jasper] [Specimen in the Natural History Museum, London]
      • St Austell District
        • Lostwithiel
Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
        • St Columb Major
          • Trebudannon
Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 191; Hall, T.M. (1868): Edward Stanford (London), 168 pp.; Collins, J.H. (1871): A Handbook to the Mineralogy of Cornwall and Devon. D. Bradford Barton Ltd. (Truro, UK), 108 pp.
        • St Dennis
          • Hendra Downs
Courtenay Smale, pers com.
P Trebilcock collection,ex M Trudgeon clay worker collection.
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
        • St Enoder
          • Fraddon
No reference listed
        • St Mewan
          • Longstone Downs
P, D, Trebilcock Collection.
          • Trewoon
P, Trebilcock. Collection
        • St Stephen-in-Brannel
          • Foxhole
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
        • Treverbyn
          • Bugle
No reference listed
          • Carluddon
            • Carclaze China Clay Pit (Baal China Clay Pit)
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
          • Stenalees
Barstow, R. W. (1982). Variscite from Hensbarrow china clay works, St. Austell, Cornwall. Mineralogical magazine, 46, 512.
      • St Erth - Gwithian Area
        • Gwinear-Gwithian
          • Copperhouse
            • Rosewarne and Herland United Mines (Rosewarne and Herland Mine; incl. Wheal Fancy; Wheal Pleasure)
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
          • Halancoose
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.
Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), p. 114.
        • Hayle
          • Great Wheal Alfred (Alfred Consols)
Michael W. Kieron collection
      • St Ives District
        • St Ives
[var: Isopyre] Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
      • St Just District
        • St Just
          • Botallack
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Carne, J. (1822): Transactions of the Royal Geological Society of Cornwall 2, 290-358
          • Pendeen
Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), p. 101.
            • Geevor Mine (North Levant Mine)
Carne, J. (1822): Transactions of the Royal Geological Society of Cornwall 2, 290-358
          • Trewellard
Carne, J. (1822): Transactions of the Royal Geological Society of Cornwall 2, 290-358
    • Cumbria
      • South Eastern Region (Westmorland)
        • Kentmere
BMS Database
    • Derbyshire
Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.
      • Eyam
Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.
    • Devon
      • Dartmoor & Teign Valley District
        • Dartmoor Forest
          • Hexworthy
Collection Of Bernie Millington
Bernie Millington collection
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
      • Okehampton area (Northern Dartmoor)
        • Belstone
Solly, R.H. (1888): Mineralogical Magazine 6, 202-211
  • Northern Ireland
    • Co. Down
      • Mourne Mts
[var: Opal-AN] Trevor Boyd Collection
  • Scotland
    • Fife
      • Raith
James Phemister and A. G. MacGregor (1942) Note on Datolite and Other Minerals in a Contact-Altered Limestone at Chapel Quarry, Near Kirkcaldy, Fife. Mineralogical Magazine 26:275-282.
    • North West Highlands (Inverness-shire)
      • Isle of Skye
        • Minginish
          • Carbost
            • Talisker
No reference listed
        • Trotternish
          • Portree
Ukraine
 
  • Crimea Oblast'
    • Crimea peninsula
Volodymyr Manyuk (2008) The Problem Of Creation Of Network National Geoparks In Ukraine. in Proceeding 33 th International Geological Congress
    • Simferopol area
      • Petropavlovka Village area
A. Tischenko. Minerals of the Crimea - World of stones, 1996, #9, p. 9-18
  • Zhytomyr Oblast' (Zhitomir Oblast')
Lyckberg, P., Chornousenko, V. & Wilson, W. E. (2009): Volodarsk-Volynski, Zhitomir Oblast, Ukraine. Mineralogical Record, 40, 473-506.; Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
USA
 
  • Alabama
    • Clay Co.
[var: Opal-AN] Mineralogy of Alabama Geol Surv Ala. Bull 120
    • Shelby Co.
      • Alabaster
Rocks & Min. (2007) 82:235-236
  • Alaska
    • Aleutians East Borough
      • Alaska Peninsula District
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    • Nome Borough
      • Kougarok District
[var: Diatomite] U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    • Southeast Fairbanks Borough
      • Delta River District
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
      • Valdez Creek District
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    • Valdez-Cordova Borough
      • Chistochina District
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
  • Arizona
    • Apache Co.
      • Navajo Indian Reservation
        • Monument Valley
          • Monument No. 2 channel
Reinhardt, E.V. (1951), Reconnaissance trip to Monument Valley, USAEL, RMO o. 624; Ridge, J.D. (1968), Ore deposits of the United States 1933-1967, Vol. 1: 799-803.
[var: Opal-AN] Witkind, I.J. & R.E. Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo Cos., AZ: 123.
    • Cochise Co.
      • Curtis
[var: Diatomite] Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87; MRDS database Dep. ID file #10060237, MRDS ID #TC10206.
      • Dos Cabezas Mts
        • Dos Cabezas (Two Heads) District
          • Dos Cabezas
Rolf Luetcke
      • Dragoon Mts
        • Middle Pass District
          • Gordon Camp
Rolf Luetcke
Rolf Luetcke
        • Turquoise District (Courtland-Gleeson District)
          • Courtland
            • Casey Hill
Rolf Luetcke
Rolf Luetcke
      • Huachuca Mts
        • Hartford District (Huachuca Mountains District)
          • Carr Canyon
[var: Opal-AN] Eckhard D. Stuart collection
Personally collected by bob Jackson, 2011
      • Little Dragoon Mts
        • Cochise District
          • Dragoon
Rolf Luetcke
      • Post Ranch
[var: Diatomite] MRDS database Dep. ID file #10060238, MRDS ID #TC10207.
Rolf Luetcke
      • Tombstone Hills
        • Tombstone District
          • Contention-Grand Central Mine group
[var: Opal-AN] Dana 6:1093.
[var: Opal-AN] Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 315; Williams, S.A. (1979), Girdite, oboyerite, fairbankite, and winstanleyite, four new tellurium minerals from Tombstone, AZ, Min.Mag.: 43: 453-457; Rocks & Min.:57:12.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 171; Williams, S.A. (1981a), Choloalite, CuPb(TeO3)2·H2O, a new mineral, Min.Mag.: 44: 55-57.
Anthony, J.W., et al (1995), Mineralogy of AZ, 3rd.ed.: 211, 212-213, 356.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Butler, B.S., et al (1938b), Geology and ore deposits of the Tombstone district, AZ, AZ Bur. Mines Bull. 143; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87.
Rolf Luetcke
      • Yellowstone District
Rolf Luetcke
    • Coconino Co.
      • Cameron District
Bollin, E. M., & Kerr, P. F. (1958). Uranium mineralization near Cameron, Arizona. In Guidebook of the Black Mesa Basin, northern Arizona: New Mexico Geological Society, 9th Field Conference Society Guidebook (Vol. 9, pp. 161-168).
      • San Franciscan volcanic field (San Francisco Peaks; San Francisco Mts)
Hanson, S. L., A. U. Fastner, W. B. Simmons (2008) Mineralogy of the Fumerole deposits at Sunset Crater Volcano National Monument, Northern Arizona. Rocks & Mnerals 83:6 pp 534-544.
    • Gila Co.
      • Globe-Miami District
        • Globe Hills District
          • Globe Hills
            • Buffalo Gulch
MRDS database Dep. ID #10109030, MRDS ID #M002898.
        • Miami-Inspiration District
          • Inspiration
            • Miami-Inspiration deposit
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Sun, M.S. (1963), The nature of chrysocolla from Inspiration mine, AZ, Am.Min.: 48: 649-658.
[var: Opal-AN] Anthony, J.W., et al (1995), Mineralogy of AZ, 3rd.ed.: 193; Granger, H.C. & R.B. Raup (1969), Geology of uranium deposits in the Dripping Spring quartzite, Gila Co., AZ, USGS PP 595.
      • Sierra Ancha Mts
        • Sierra Ancha District
          • Asbestos Point (Asbestos Peak) area
            • Warm Spring Canyon
[var: Opal-AN] Granger, H.C. & R.B. Raup (1969), Geology of uranium deposits in the Dripping Spring quartzite, Gila Co., AZ, USGS PP 595; Granger, H.C. & R.B. Raup (1959), Uranium deposits in the Dripping Spring Quartzite, Gila Co., AZ, USGS Bull. 1046-P: 457-459.
          • Aztec Lodge area
            • Workman Creek area
[var: Opal-AN] Granger, H.C. & R.B. Raup (1959), Uranium Deposits in the Dripping Spring Quartzite, Gila Co., AZ, USGS Bull. 1046-P: 469-470.
[var: Opal-AN] Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 297; Granger, H.C. & R.B. Raup (1969), Geology of uranium deposits in the Dripping Spring quartzite, Gila Co., AZ, USGS PP 595.
          • Rose Creek Lodge area
            • Workman Creek
[var: Opal-AN] Granger, H.C. & Raup (1959), Uranium deposits in the Dripping Spring Quartzite, Gila Co., AZ, USGS Bull. 1046-P: 467-468.
          • Workman Creek Valley
            • Rose Creek Lodge area
[var: Opal-AN] Granger, H.C. & R.B. Raup (1959), Uranium deposits in Dripping Spring Quartzite, Gila Co., AZ, USGS Bull. 1046-P: 446, 464-466.
    • Graham Co.
      • Gila Mts
        • Lone Star District (Safford District; Dos Pobres District)
          • Gila Valley
            • Fort Thomas
[var: Diatomite] MRDS database Dep. ID #10060232.
          • Solomon Pass
[var: Diatomite] Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87; MRDS database Dep. ID #10060233.
      • Whitlock Mts
        • Slick Rock Wash
[var: Diatomite] MRDS database Dep. ID #10210079.
    • Greenlee Co.
      • Ash Peak District (Twin Peaks District)
        • Duncan
P Cristofono collection
      • Shannon Mts
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Reber, L.E., Jr. (1916), The mineralization at Clifton-Morenci, Econ.Geol.: 11: 528-573.
          • Morenci
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Moolick, R.T. & J.J. Durek (1966), The Morenci district, in S.R. Titley and C.L. Hicks (editors), Geology of the porphyry copper deposits, southwestern North America, Univ. AZ Press, Tucson: 221-231.
      • Steeple Rock District (Duncan District)
        • Duncan area Diatomite deposits
[var: Diatomite] MRDS database Dep. ID file #10161567.
    • La Paz Co.
      • Buckskin Mts
[var: Opal-AN] The-Vug.com Collecting Minerals of La Paz County DVD
[var: Opal-AN] P Cristofono collection
        • Santa Maria District (Planet District; Swansea District; Bill Williams District)
[var: Opal-AN] The-Vug.com Collecting Minerals of La Paz County DVD
      • Trigo Mts
        • Silver District
[var: Opal-AN] Dana 6: 1094.
    • Maricopa Co.
      • Saddle Mountain
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Galbaith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87..
      • Vulture Mts
        • Vulture District
[Precious Opal] Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87.
    • Mohave Co.
      • Aquarius Cliffs area
Granger, H.C. & Raup, R.B. (1962), USGS Bull. 1147A, Recon. Study of Uranium Deps. in AZ: A16-A18.
      • Artillery Mts
        • Maggie Canyon
Mouat, M.M. (1962) Manganese oxides from the Artillery Mountains area, Arizona. American Mineralogist, 47, 744-757.
[var: Opal-AN] Galbraith, F.W. & Brennan (1959), Minerals of AZ: 87.
        • Oatman District (San Francisco District; Union Pass District)
          • Union Pass District (Katherine District)
[var: Fire Opal] Galbraith, F.W. & Brennan (1959), Minerals of AZ: 87.
      • Lost Basin Mts (Lost Basin Range)
        • Lost Basin District
Theodore, T.G., et al (1987), USGS PP 1361: 148-149 (Table 11).
    • Pima Co.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Sun, M.S. (1961), Differential thermal analysis of shattuckite, Am.Min.: 46: 67-77.
        • Little Ajo Mts
          • Ajo
Thomas, W.J. & R.B. Gibbs (1983), Famous mineral localities: The New Cornelia mine, Ajo, AZ, Min.Rec.: 14: 283-298; Gilluly, J. (1946), The Ajo mining district, Arizona, USGS PP 209: 89.
      • Santa Rita Mts
        • Helvetia-Rosemont District
[var: Diatomite] MRDS database Dep. ID file #10060227, MRDS ID #TC10194.
          • Helvetia
            • Monument Mountain
Rolf Luetcke
            • Tiptop Mountain
              • Tiptop Mine group (Tiptop Camp prospects/mines)
[var: Opal-AN] P Cristofono collection, 2008
      • Sierrita Mts
        • Pima District (Olive District; Mineral Hill District; Twin Buttes District)
          • San Xavier
[var: Opal-AN] No reference listed
          • Stevens Mountain
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193.
      • Silver Bell Mts
        • Silver Bell District
          • Mineral Mountain
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Kerr, P.F. (1951), Alteration features at Silverbell, AZ, Geol. Soc. Amer. Bull.: 62: 451-480; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87.
    • Pinal Co.
      • Mineral Mountain District
        • Superior area
          • Reymert Canyon
[var: Opal-AN] Collected by C. Lemanski, Jr.
      • Superior District
        • Superior
Univ. AZ Bull. 41 (1916-17), Mineralogy of useful Minerals in AZ: 48; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193..
    • Santa Cruz Co.
[Precious Opal] Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193.
      • Oro Blanco Mts
        • Oro Blanco District (Ruby District)
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193.
      • Redrock District
[var: Diatomite] Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
        • Huachuca Mountains Northwestern foothills
[var: Diatomite] Peirce, H.Wesley (1969), Diatomite, in USGS & Arizona Bureau of Mines & U.S. Bureau of Reclamation, Mineral and Water Resources of Arizona, Arizona Bureau of Mines Bull. 180 (USGS Bull.871): 337-342.
        • Redrock Canyon
          • East of Red Rock Canyon
[Precious Opal] Lewis, W. Scott (1942), Gem collecting in California: Hobbies: 47: 116-117; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Santa Cruz village area
[var: Opal-AN] Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87.
      • Santa Rita Mts
        • Tyndall District
          • Salero area
            • Grosvenor Hills
[var: Opal-AN] Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 361.
    • Yavapai Co.
      • Bradshaw Mts (Bradshaw Range)
        • Agua Fria District
          • Mayer
Rolf Luetcke
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193, 349; Hewett, et al (1963); Galbraith, F.W. & Brennan (1959), Minerals of AZ: 87.
        • Castle Creek District
[Precious Opal] Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87.
          • Copperopolis
Rolf Luetcke
        • Pine Grove District
          • Crown King
            • Lane Mountain
[MinRec 22:21]
        • Tip Top District
[var: Opal-AN] Dale, V.B. (1961), Tungsten Deposits of Gila, Yavapai, and Mohave Counties, Arizona, US Bureau of Mines Information Circular 8078
      • Camp Verde District
[var: Diatomite] MRDS database Dep. ID #10060244, MRDS ID #TC10214.
      • Eureka District
        • Bagdad
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87.
      • Mayer
        • Agua Fria River
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 195; Hewett, D.F. & M. Fleischer (1960), Deposits of the manganese oxides, Econ.Geol.: 55: 1-55.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87.
    • Yuma Co.
      • Kofa Mts (S.H. Mts)
        • Kofa District
          • Kofa Game Range
[var: Opal-AN] Former Don Miller collection
      • Muggins Mts
        • Muggins District
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 164 (Table 4); US Atomic Energy Commission Prelim. Reconnaisance Reports; Arizona Bureau of Mines file data.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 127, 155, 193, 411; Outerbridge, W.F., et al (1960), Weeksite, a new uranium silicate from the Thomas Range, Juab Co., UT, Am.Min.: 45: 39-52.
  • Arkansas
    • Garland Co.
      • Lake Catherine
Rocks and Minerals, (1988) 63:104-125
      • Wilson Springs (Potash Sulfur Springs)
        • Union Carbide Mine
R&M 70:3 pp 154-170
[var: Geyserite] Jay Ellis Ransom,1974, Gems and Minerals of America
      • Hot Springs
        • Indian Mountain
[var: Diatomite] Rocks and Minerals, (1988) 63:104-125
Rocks and Minerals, (1976) 51:495-507
Henry Barwood - unpublished (2010)
    • Pike Co.
      • Murfreesboro
[var: Opal-AN] P Cristofono collection, 2007
    • Polk Co.
      • Shady
Rocks & Min.:63:118.
Rocks and Minerals, (1988) 63:104-125
    • Pulaski Co.
      • Little Rock
Rocks and Minerals, (1988) 63:104-125; Rocks and Minerals, (1989) 64:314-322
Henry Barwood - unpublished (2010)
    • Sevier Co.
      • Gillham
Rocks & Min.:63:123; Howard(1979).
  • California
    • Alpine Co.
MinRec 22:29-42
        • Leviathan Peak
Pabst, Adolf (1940), Cryptocrystaline pyrite from Alpine County, California: American Mineralogist: 25: 425
    • Amador Co.
      • Fiddletown District (Oleta District)
        • River Pines
[var: Moss Opal] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10259764.
      • Pardee District
        • Sunnybrook
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028081.
      • Volcano District
[var: Wood Opal] California Journal of Mines and Geology (1954): 50(1); January, 1954: 211; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10114252.
[var: Wood Opal] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028324.
    • Calaveras Co.
      • Camanche District
        • Wallace
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028568.
      • East Belt
        • Mokelumne Hill District
          • Mokelumne Hill
            • Chili Gulch (Chile Gulch ?)
Browne, J.R. (1869), Report of J. Ross Browne on the mineral resources of the states and territories west of the Rocky Mountains (US Treasury Dept.), 674 pp., H.H. Bancroft and Co., San Francisco [reprint of 2]: 56; Kunz, George Frederick (1905a), Gems, jewelers’ materials, and ornamental stones of California: California Division Mines Bulletin 37, 171 pp.: 76; Lewis, W. Scott (1933), Occurrences of opal in California: Rocks & Minerals: 8: 36-37.
Clark, William B. & Lydon, Philip A., California division of mines and geolgy (1963) MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIFORNIA, county report number 2, pages 87-88.
Clark, William B. & Lydon, Philip A., California division of mines and geology (1963) MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIFORNIA, county report number 2, page 91
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10109141.
      • French Creek District
        • Mountain Top
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10109076.
      • Mother Lode Belt
        • Carson Hill District (Melones District)
          • Melones
            • Carson Hill Gold Mining Company Mines (Carson Hill Mines)
Dana 7:I:206; Dana 6: 1095.
      • Pardee District
        • Camp Pardee
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10284427.
        • Toyon
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028681.
    • Colusa Co.
      • Coast Ranges
        • Sugarloaf
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10029530.
        • Sulphur Creek District (Sulfur Creek District; Wilbur Springs District)
          • Wilbur Springs
            • Cherry Hill deposit
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Opal-C] White, D.E. (1967) Mercury and base-metal deposits with associated thermal and mineral waters. In: H.L. Barnes (Editor), Geochemistry of hydrothermal ore deposits. Holt Reinhart and Winston, New York: 591; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 351.
[var: Opal-C] White, D.E. (1967) Mercury and base-metal deposits with associated thermal and mineral waters. In: H.L. Barnes (Editor), Geochemistry of hydrothermal ore deposits. Holt Reinhart and Winston, New York: 591; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.
Slowey, A.J., and Rytuba, J.J. (2008): USGS Open-File Report 08-1179
    • Contra Costa Co.
      • Bayview-Montalvin
[var: Diatomite] Davis, Fenelon Francis & J.W. Vernon (1951), Mines and mineral resources of Contra Costa County, California: California Journal of Mines and Geology (Report 47): 47(4): 574, 610; Davis, Fenelon Francis and H.B. Goldman (1958) Mines and mineral resources of Contra Costa County. California Journal of Mines and Geology: 54(4): 521, 571, Pl. 5.
    • El Dorado Co.
      • Salmon Falls District (Flagstaff Hill area)
        • Flagstaff Hill
          • Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine)
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Big Creek-Rush Creek District
Alfors, J.T., M.C. Stinson, R.A. Matthews & A. Pabst (1965), Seven new barium minerals from eastern Fresno County, California: American Mineralogist: 50: 318, 322-324; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 464.
      • Diablo Range
        • Little Panoche Detention Dam
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10212376.
        • Tumey Hills
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10212435.
      • Fresno
        • Mountains East of Fresno
[var: Moss Opal] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
    • Glenn Co.
      • Coastal Range
        • Red Mountain
          • Black Diamond group
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Imperial Co.
      • Chocolate Mts
        • Paymaster District
[var: Opal-Agate] Perry, L. E. 1961 Varied agate types and locations in California: Lapidary Journal, v. 15, no. 3, p. 308-314
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Coso Mts (Coso Range)
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 115.
          • Coso Hot Springs
            • Coso Hot Springs deposit
www.mineralsocal.org; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Troxel, Bennie Wyatt, Stinson, M.C., and Chesterman, C.W. (1957) Uranium. California Division of Mines Bulletin 176: 672-674; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.
          • Sugarloaf Mountain
Rogers, Austin Flint (1922), A new occurrence of cristobalite in California: Journal of Geology: 30: 211-216; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 162.
Pemberton, H. Earl (1983), Minerals of California: 351.
      • Darwin Hills
        • Darwin District
          • Darwin
[var: Opal-AN] Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.
      • Lake Tecopa Basin
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10100710.
      • Saline Valley
        • Badwater Springs
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10114829.
      • Saratoga District (Tecopa Mountain District; Shoshone District ?)
        • Dublin Hills
          • Shoshone
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Kern Co.
      • Boron
Walker, G.W., Lovering, T.G., and Stephens, H.G. (1956), Radioactive Deposits in California: Special Report 49 of the California Division of Mines & Geology: 19; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 326.
      • El Paso Mts
        • Last Chance Canyon
[Precious Opal] Christopher N. Wentzell
[Precious Opal] Christopher Wentzell
[var: Wood Opal] Dibblee, T.W., Jr. and T.E. Gay (1952) Mineral deposits of Saltdale quadrangle. California Division Mines and Geology Bulletin 160: 49-50; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282; Sinkankas, J. (1976) Gemstones of North America II. Van Nostrand Reinhold Co., New York: 58-59; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.
MacFall (1951), Gem Hunter's Guide, 1st ed.
        • Ricardo
Murdoch, Joseph & Robert W. Webb (1942), Notes on some minerals from southern California, III: American Mineralogist: 27: 330; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 71; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 368-369; Tschernich, R. (1992): Zeolites of the World, 64
      • Johannesburg District
        • Johannesburg
[var: Moss Opal] Stoddard, B.H. (1923), Gems and precious stones Mineral Resources U.S., 1920, part 2: 215-218; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Kramer District
        • Boron
Morgan, V. and Erd, R.C. (1969) Minerals of the Kramer borate district, California California Division of Mines and Geology Mineral Information Service: 22(9&10): 165, 169; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.
      • Rademacher District
        • Rademacher
Kunz, George Frederick (1900), Precious stones: Mineral Resources U.S., 1899: 54 (page = 454 ?); Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 317.
      • Rosamond
[var: Milk Opal] Lewis, W. Scott (1933), Occurrences of opal in California: Rocks & Minerals: 8: 36-37; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
[var: Diatomite] Braitwaite, R., Paar, W., and Chisholm, J., 1989, Phurcalite from Dartmoor, Southwest England,and its Identity with 'Nisaite' from Portugal, Mineralogical Magazine, 53:583-589.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Mayacmas Mts (Mayacamas Mts)
White, D.E. (1967) Mercury and base-metal deposits with associated thermal and mineral waters. In: H.L. Barnes (Editor), Geochemistry of hydrothermal ore deposits. Holt Reinhart and Winston, New York: 589; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 356.
          • Castle Rock Springs
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
          • Middletown
            • Great Western-Mirabel group
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Opal-AN] Dana 6: 1096.
      • Sulphur Creek District (Sulfur Creek District; Wilbur Springs District)
        • Clear Lake Oaks
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 190; Brice, J.C. (1953), Geology of Lower Lake quadrangle, California: California Division Mines Bulletin 166: 62; White, D.E. & C.E. Roberson (1962), Sulphur Bank, California: Geological Society of America Buddington Memorial Volume: Petrologic studies: 403; Rocks & Minerals (1947): 22: 615-616.; White, D.E. (1967) Mercury and base-metal deposits with associated thermal and mineral waters. In: H.L. Barnes (Editor), Geochemistry of hydrothermal ore deposits. Holt Reinhart and Winston, New York: 579; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 215, 273, 355; Economic Geology (1988): 83: 606-618.
        • Lower Lake
USBM IC8252
        • Wilbur Springs area
Bailey, Edgar H. (1959), Froth veins, formed by immiscible hydrothermal fluids, in mercury deposits, California: Geological Society of America Bulletin 70: 661; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Red Rock
[var: Diatomite] California Division of Mines and Geology (1981), Mines & Mineral Producers Active in California during 1980, Special Publication 58; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10163240.
Butler, 1995. Rockhounding California, p.158.
      • Westwood
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10138895.
    • Los Angeles Co.
      • Acton District
        • Acton
          • Antelope Valley
Oakeshott, Gordon Blaisdell (1958) Geology and mineral deposits of San Fernando quadrangle, Los Angeles County, California. California Division of Mines Bulletin 172, 147 pp.
      • Charter Oak
[var: Diatomite] Sampson, Reid J. (1937), Mineral resources of Los Angeles County, California: California Journal of Mines and Geology, California Mining Bureau (Report 33): 33(3): 202; Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology, California Division of Mines (Report 50): 50(3&4): No. 144, p. 664.
      • Lang
mineralsocal.org
      • Lomita
[var: Diatomite] Merrill, Frederick James Hamilton (1916), San Diego, Imperial Counties: Calif. Min Bureau Report 14: 635-743; …(abstract): Geol. Zentralbl., Band 27: 395 (1922): 507; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Malibu
        • Point Dume
[var: Diatomite] Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology, California Division of Mines (Report 50): 50(3&4): 664.
      • Palmdale
        • Hunt Canyon
Pemberton, H. Earl and Alexander, G.S. (1968) A new zeolite locality – overlooked 115 years ago. Mineral Explorer 2, 8 pp.: 7; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 353-354, 355, 373-374, 376.
      • Palos Verdes peninsula
        • Rolling Hills
[var: Diatomite] California Division of Mines and Geology, Mineral Information Service: California Mineral Production 1962: 16(11): 11, 13; USGS MRDS database (2005).
      • Rolling Hill Estates
[var: Diatomite] California Journal of Mines and Geology (1937): 33: 201-202; Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology: 50: No. 143, p. 664.
      • San Gabriel Mts
        • Kagel Canyon
[var: Diatomite] Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology, California Division of Mines (Report 50): 50(3&4): No. 207, p. 688.
      • Santa Catalina Island
Bailey, Edgar H. (1941a), Mineralogy, petrology and geology of Santa Catalina Island, California: Unpublished Ph.D. dissertation, Stanford University: 56, 75; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
[var: Diatomite] Fleischer, P. (1972) Sepiolite associated with Miocene diatomite, Santa Cruz basin, California. American Mineralogist: 57: 903-913; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 441.
      • Santa Monica Mts
        • Agoura Hills
MarekC field collection 2014
M.Chorazewicz collection
        • Los Angeles
          • Hollywood Hills
            • Hollywood
              • Cahuenga Pass
                • Cahuenga Boulevard roadcut
Neuerberg, George Joseph (1951), Minerals of the eastern Santa Monica Mountains, Los Angeles city: American Mineralogist: 36: 156-160.
    • Madera Co.
      • Indian Springs
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10256808.
[var: Opal-AN] Pelletier, 1962. Mineral Species & Localities of Marin County
    • Mendocino Co.
      • Cloverdale area
        • Russian River
Pabst, Adolf, Gross, E.B., and Alfors, J.T. (1967) Rosenhahnite, a new hydrous calcium silicate from Mendocino County, California. American Mineralogist: 52: 336; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.; Pabst, Adolf, Gross, E.B., and Alfors, J.T. (1967) Rosenhahnite, a new hydrous calcium silicate from Mendocino County, California. American Mineralogist: 52: 336-351
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • California Aquaduct Dos Amigos Pumping Station
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10139878.
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10207641.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Benton Range
        • Chidago District
          • Banner Ridge
Calif Div Mines SR48 "Economic Geology of the Casa Diablo Mtn Quad CA"
[var: Opal-AN] Lemmon, Dwight Moulton (1941b), Tungsten deposits of the Benton Range, Mono County, California: USGS Bulletin 22-S: 591; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 176, 282; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 355.
      • Bodie Hills
        • Bridgeport District
          • Bridgeport
Holmes, G.H. (1965) Mercury in California. US Bureau of Mines Information Circular 8252: 176-177; Pemberton, H. Earl (1983), Minerals of California: 117.
          • Potato Peak
Holmes, G.H. (1965) Mercury in California. US Bureau of Mines Information Circular 8252: 176-177; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 117.
          • Willow Springs
Holmes, Jr., G.W. (1965), Mercury in California: in: U.S. Bureau of Mines Information Circular 8252; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 117.
    • Monterey Co.
      • Diablo Range
        • Parkfield District
          • Parkfield
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • King City
[var: Diatomite] Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: 40-41.
      • Santa Lucia Mts (Santa Lucia Range)
        • Bradley
[var: Diatomite] Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: 39; USGS MRDS database (2005).
[var: Diatomite] Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: 39-40; USGS MRDS database (2005).
[var: Diatomite] Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: 40.
[var: Diatomite] Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: 40; USGS MRDS database (2005).
        • Bryson
[var: Diatomite] Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: No. 31, p. 123; USGS MRDS database (2005).
[var: Diatomite] California Geology (1981): 185, figure 2 (September, 1981): 185, figure 2; USGS MRDS database (2005).
        • Del Rey Oaks
[var: Diatomite] Hart, E.W. (1966) Mines and mineral resources of Monterey County, California. California Division Mines and Geology County Report 5, 142 pp.: 41.
[var: Opaline] [Clark, 1993 - "Hey's Mineral Index"]
      • Knoxville area
USGS MRDS database (2005), loc. file ID #10031632.
      • Knoxville District
[var: Prase Opal] Rocks&Min 11(8):117
Sherlock, R.L. and Lehrman, N.J. (1995), Occurrences of dendritic gold at the McLaughlin Mine. Mineralium Deposita: 30 (3-4): 323-327.
Rogers, Austin Flint (1931b), Castanite, a basic ferric sulphate from Knoxville, California: American Mineralogist: 16: 397; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 273.
      • Mayacmas Mts (Mayacamas Mts)
        • Calistoga District (Silverado District)
          • Calistoga
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
            • Twin Peaks
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
          • Calistoga Hot Springs
USGS MRDS database (2005), loc. file ID #10031657.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Oakville District
          • Oakville
[var: Diatomite] California Geology (1981): 185, figure 2 (September, 1981); USGS MRDS database (2005), loc. file ID #10212662.
      • Vichy Springs
[var: Diatomite] Weaver, C.E. (1949), Geology and Mineral Deposits of an Area North of San Francisco Bay, California: California Division of Mines Bulletin 149: 87, Pls. 4 & 6.
    • Nevada Co.
      • Nevada City District (Grass Valley District)
        • Grass Valley
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Laguna Woods
[var: Diatomite] California Preliminary Report: 15: Pls. 4 and 1.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
    • Plumas Co.
      • Clio
Rocks & Min.: 17:412.
    • Riverside Co.
      • Crestmore
        • Crestmore quarries
          • Sky Blue Hill
[var: Opal-AN] Woodford, A.O., Crippen, R.A., and Garner, K.B. (1941) Section Across Commercial Quarry, Crestmore, California. American Mineralogist: 26: 366, 368; Woodford, A.O. (1943), Crestmore minerals: California Division Mines Report 39: 359; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 356.
      • Jurupa Mts
        • Jurupa
MinRec 15:273-290
      • Mule Mts
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • Picacho Peak
Lapis 19(12), 40 (1994); Mineralogical Record (1993): 24: 471-475.
[var: Diatomite] Anderson, Robert, and Robert W. Pack (1915), Geology and oil resources of the west border of the San Joaquin valley north of Coalinga, California, USGS Bulletin 603, 220 pp.: 211; USGS MRDS database (2005), loc. file ID #10285956.
    • San Bernardino Co.
      • Baker
        • Otto Mountain
[var: Opal-AN] Eckhard D. Stuart collection
      • Bloomington
Cooney, R.L. (1956), The mineralogy of the Jensen and Henshaw quarries near Riverside, California: Unpublished Master’s thesis, University of California at Los Angeles: 22, 34; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 356.
      • Cady Mts
        • Afton
      • Fort Irwin
Sanders, J. V. (1975). Microstructure and crystallinity of gem opals. American Mineralogist, 60, 749-757.
      • Hinkley
        • Black Canyon
Kunz, George Frederick (1903), Precious stones: Mineral Resources U.S., 1902: 76 (?); Baker, Charles L. (1911), Notes on the later Cenozoic history of the Mohave Desert region in southeastern California: California University Department of Geological Science Bulletin: 6: 347 (?); Sterrett, Douglas Bovard (1912), Gems and precious stones: Mineral Resources U.S., 1911, part 2: 1050; Sinkankas, J. (1959) Gemstones of North America. D. Van Nostrand Co., New York, 675 pp.: 124.
Christopher N. Wentzell
Tschernich, 1992. Zeolites of the World, p.315
      • Signal District (Vontrigger District)
      • Soda Lake Mts
        • Baker
[var: Opal-AN] Collected by Brent Thorne
    • San Diego Co.
      • Aguanga Mountain District (Smith Mountain District)
        • Oak Grove
          • Aguanga Mountain
[var: Opal-AN] Cordova, E. M. 2009. Personal communication with S. L. Ritchie, SDMC, Feb.
      • Pala District
        • Pala
Jahns, Richard Henry & Wright, Lauren A. (1951), Gem and lithium-bearing pegmatites of the Pala district, San Diego County, California. California Division of Mines Special Report 7-A: p. 31.
      • Rincon District
        • Rincon
          • Rincon Mountain
[var: Opal-AN] Rogers, A. F. 1910. Minerals From The Pegmatite Veins Of Rincon, San Diego Co., California. Columbia University School Of Mines Quarterly Journal Of Applied Science, Vol. 31 pp. 208-218.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Los Osos
[var: Diatomite] Laizure, Clyde McK (1925), San Francisco field division: California Journal of Mines and Geology, California Mining Bureau (Report 21): 21: 512; Franke, Herbert A. (1935a), Mines and mineral resources of San Luis Obispo County, California: California Division Mines (Report 31): 31(4): 419; USGS MRDS database (2005).
[var: Diatomite] Laizure, Clyde McK (1925), San Francisco field division: California Journal of Mines and Geology, California Mining Bureau (Report 21): 21: 512-513; Franke, Herbert A. (1935a), Mines and mineral resources of San Luis Obispo County, California: California Division Mines (Report 31): 31(4): 419-420.
[var: Diatomite] Minobras (1973), Southern California Industrial Minerals: 91; USGS MRDS database (2005).
      • Pismo Beach
[var: Diatomite] Laizure, Clyde McK (1925), San Francisco field division: California Journal of Mines and Geology, California Mining Bureau (Report 21): 21: 513; Minobras (1973), Southern California Industrial Minerals: 90.
      • San Luis Obispo
[var: Diatomite] Laizure, Clyde McK (1925), San Francisco field division: California Journal of Mines and Geology, California Mining Bureau (Report 21): 21: 512; USGS MRDS database (2005).
      • Santa Lucia Mts (Santa Lucia Range)
        • Arroyo Grande
[var: Diatomite] Laizure, Clyde McK (1925), San Francisco field division: California Journal of Mines and Geology, California Mining Bureau (Report 21): 21: 512; USGS MRDS database (2005), loc. file ID #10286912.
        • Cambria-Oceanic District
          • Cambria
Am Min 64:3-4 pp 1026-1038
        • Chorro
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Shell Beach
[var: Diatomite] Franke, Herbert A. (1935a), Mines and mineral resources of San Luis Obispo County, California: California Division Mines (Report 31): 31(4): 419; USGS MRDS database (2005).
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Palo Alto area
Rogers, Austin Flint (1911a), Eglestonite from San Mateo County, California: American Journal of Science, 4th. Series: 32: 48-50; Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78: 149; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 173-174.
    • Santa Barbara Co.
      • Buellton
[var: Diatomite] California Geology (1981): 185, figure 2 (September, 1981); USGS MRDS database (2005).
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 4; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10262279.
      • Las Cruces
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10262074.
      • Lompoc
[var: Diatomite] USGS MRDS database (2005).
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; California Division of Mines (1962): Mineral Information Service: 15(2): 6; USGS MRDS database (2005).
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: 77-78; USGS MRDS database (2005).
[var: Diatomite] California Division of Mines and Geology (1990), Mines and mineral producers active in California (1988-89), California Department of Conservation, Division of Mines and Geology, Special Publication 103; USGS MRDS database (2005).
Amir Akhavan Collection
[var: Diatomite] Huguenin, Emile (1919), Santa Barbara, Ventura Counties: California Division Mines Report 15: 737; Mulryan, Henry (1936), Geology, mining and processing of diatomite at Lompoc, Santa Barbara County, California: A.I.M.E. Tech. Pub. 687, 30 pp.: 133; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10213713.
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10286715.
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10116715.
[var: Diatomite] California Division of Mines Bulletin 186 (1966): Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10117036.
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10286712.
      • Los Olivos
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 4; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10213477.
      • Santa Maria
Rogers, Austin Flint (1938), Fossil termite pellets in opalized wood from Santa Maria, California: American Journal of Science, 5th. Series: 36: 389-392; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Santa Ynez
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 4.
      • Solvang
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 4; USGS MRDS database (2005).
      • Vandenberg Air Force Base
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10189485.
[var: Diatomite] Dibblee, T.W., Jr. (1950) Geology of southwestern Santa Barbara County, California, Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota Quadrangles, California Division of Mines Bulletin 150: Pl. 3; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10286976.
    • Santa Clara Co.
      • Diablo Range
        • Coyote District
          • Coyote
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Mount Hamilton
          • Mount Hamilton area
Murata, K.J. and Whiteley, K.R. (1973) Zeolites in the Miocene Brones sandstone and related formations of the central Coast Ranges, California. USGS Jour. Res.: 1: 256-257, 259; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 374.
      • San Jose
        • Oak Hill
Crittenden, Max D., Jr. (1951), Geology of the San Jose-Mount Hamilton area, California: California Division Mines Bulletin 157: 63; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 172; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 221.
      • Santa Cruz Mts
        • New Almaden District
          • New Almaden
            • Almaden Quicksilver County Park
Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
Rocks & Minerals (1944): 19: 346-347.
    • Shasta Co.
      • Cascade Range
        • Brush Mountain
[var: Diatomite] Diller, J.S. (1895), Description of the Lassen Peak quadrangle, California: USGS Geol. Atlas, Lassen Peak folio (No. 15); […(abstract): Journal of Geology: 3: 974-976]; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10117079.
        • Burney Spring Mountain
[var: Diatomite] Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 107; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 382.
[var: Diatomite] California Division of Mines and Geology (1990), Mines and mineral producers active in California (1988-89), California Department of Conservation, Division of Mines and Geology, Special Publication 103; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10256731.
[var: Diatomite] California Division of Mines and Geology (1981), Mines & Mineral Producers Active in California during 1980, Special Publication 58; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10286607.
[var: Diatomite] Logan, Clarence August (1926), El Dorado, Shasta and Trinity Counties: California Mining Bureau. Report 22: 1-67, 163-166; Averill, Charles V. (1939), Mineral resources of Shasta County: California Journal of Mines and Geology, California Division of Mines (Report 35): 35(2): 128-129; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077513, 10111066, & 10237834.
[var: Diatomite] Averill, Charles V. (1939), Mineral resources of Shasta County: California Journal of Mines and Geology, California Division of Mines (Report 35): 35(2): 128-129; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10111066 & 10237834.
[var: Diatomite] California Division of Mines and Geology, Mineral Information Service (1963): 16(2); USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10116501.
        • Chalk Mountain
[var: Diatomite] Averill, Charles V. (1939), Mineral resources of Shasta County: California Journal of Mines and Geology, California Division of Mines (Report 35): 35(2): 128; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10111067 & 10286850.
        • Haney Mountain
[var: Diatomite] California Geology (1981): 185, figure 2 (September, 1981); USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10213865.
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10237757.
        • Lassen Volcanic National Park
Williams, Howel (1932), Geology of the Lassen Volcanic National Park, California: University of California Department of Geological Sciences Bulletin: 21: 249; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 235; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 265, 438.
Robert G. Lee, John H. Dilles, David A. John, Tanya L. Abela (2005) The mineralogy and origin of hydrothermally altered Quaternary volcanic rocks on the south flank of Lassen volcano, California: Interim report for USGS Mineral Resource External Research Program grant of $42,000 in FY 2005
        • Lookout Mountain
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10262263.
        • Shingletown
[var: Diatomite] California Journal of Mines and Geology (1928) (Report 24): 24: 166; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077512 & 10164811.
      • Klamath Mts
        • East Shasta Copper - Zinc District
          • Heroult
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077528.
    • Siskiyou Co.
      • Cascade Range
        • Copco Lake
[var: Diatomite] California Division of Mines Bulletin 151: 59.
        • Lava Beds National Monument
Swartzlow, Carl Robert & Walter David Keller (1937), Coralloidal opal: Journal of Geology: 45: 101-108; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 356.
      • Dunsmuir
MacFall, 1951. Gem Hunter's Guide, 1st ed.
      • Klamath Mts
        • Shasta Retreat
          • Mount Bradley
[var: Fire Opal] Murdoch, Joseph (1946), Progress on revision of Bulletin 113 “Minerals of California,” with notes on some new mineral occurrences: California Division Mines Report 42: 197-198; […(abstract): Geological Society of America Bulletin: 57: 1256]: 101; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10286923.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Coast Range
        • Guerneville District
          • Guerneville
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Quicksilver resources of California: with a section on metallurgy and ore ... By Walter Wadsworth Bradley (1917)
        • Warm Springs Dam
          • Skaggs Springs
Everhart, Donald Lough (1950a), Skaggs Springs quicksilver mine, Sonoma County, California: California Journal of Mines and Geology: 46: 390; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 124, 343; American Mineralogist (2009): 94: 1325–1332.
      • Glen Ellen
        • Weise Ranch
[var: Fire Opal] Bradley, W.W. (1916a), Colusa, Glenn, Lake, Marin, Napa, Solano, Sonoma, Yolo County: California Mining Bureau. Report 14: 321; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Mayacmas Mts (Mayacamas Mts)
        • Fetters Hot Springs
[var: Diatomite] Honke, Martin T., Jr. & Wm. E. Ver Planck, Jr. (1950), Mines and mineral resources of Sonoma County, California: California Journal of Mines and Geology: 46(1): 97; Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 282.
        • West Mayacmas District
          • Castle Rock Springs area
Bailey, Edgar H. (1946), Quicksilver deposits of the western Mayacmas district, Sonoma County, California: California Journal of Mines & Geology, California Division Mines (Report 42): 42: 199-230; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 356.
Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
          • Cloverdale
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
          • Mark West Springs
[var: Diatomite] Honke, Martin T., Jr. & Wm. E. Ver Planck, Jr. (1950), Mines and mineral resources of Sonoma County, California: California Journal of Mines and Geology: 46(1): 94; USGS MRDS database (2005).
Vonsen, Magnus (1941) Preliminary report on minerals of The Geysers of Sonoma County, California. Mineralogist: 9: 247; Vonsen, Magnus (1946), Minerals at “The Geysers,” Sonoma County, California: California Division Mines Report 42: 291; 87-293; White, D.E. (1967) Mercury and base-metal deposits with associated thermal and mineral waters. In: H.L. Barnes (Editor), Geochemistry of hydrothermal ore deposits. Holt Reinhart and Winston, New York: 590; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 356; Dunning, G. S. & Cooper, J. F. (1993): History and minerals of The Geysers Sonoma County, California. Mineralogical Record (1993): 24(5): 339-352.
      • Sonoma Mts
        • El Verano
[var: Diatomite] Honke, Martin T., Jr. & Wm. E. Ver Planck, Jr. (1950), Mines and mineral resources of Sonoma County, California: California Journal of Mines and Geology: 46(1): 94, 97 (?); USGS MRDS database (2005).
        • Glen Ellen
[var: Diatomite] Honke, Martin T., Jr. & Wm. E. Ver Planck, Jr. (1950), Mines and mineral resources of Sonoma County, California: California Journal of Mines and Geology: 46(1): 94.
    • Stanislaus Co.
      • Cooperstown
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10166124.
      • Crows Landing
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10166026.
    • Tehama Co.
      • Inskip Hill
Anderson, Charles A. (1930), Opal stalactites and stalagmites from a lava tube in northern California: American Journal of Science, 5th. Series: 20: 22-26; Anderson, Charles A. (1931b), Opal stalactites from a lava tube in northern California (abstract): Geological Society of America Bulletin: 42: 310; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 356.
    • Trinity Co.
      • Coastal Range
        • Wildhorse Peak
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077858.
[var: Diatomite] Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282.
      • Ivanhoe
        • Venice Hills
[var: Chrysopal] D. B. Sterrett (1912) Mineral Resources of the United States Calendar Year 1911. US Government Printing Office.
    • Tuolumne Co.
      • East Belt
        • Big Oak Flat District
          • Groveland
[var: Diatomite] USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10111242 & 10263044.
    • Ventura Co.
      • Fillmore
[var: Diatomite] Huguenin, Emile (1919), Santa Barbara, Ventura Counties: California Division Mines Report 15: 761; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 288.
      • Santa Monica Mts
        • Thousand Oaks
[var: Hyalite] DeVito, A. N. (1992), Brookite and stilbite in the Santa Monica Mountains. Bull. Min. Soc. So. Calif.: 62(2) (Feb 1992): 7.
  • Colorado
    • Archuleta Co.
      • Wolf Creek Pass
Rocks & Minerals 79:5 pp316-324
    • Boulder Co.
      • Boulder Co. Tungsten District
USGS Bull 583
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) E.B. Eckels; U.S. Geological Survey Professional Paper 223
    • Chaffee Co.
Ralph Van Alstine, (1969), USGS Prof. Paper 626
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Poncha Springs
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Opal-AN] Minerals of Colorado (1997) E.B. Eckels
      • Chalk Creek District
Bull. Soc. Franç. Minéralo. Cristallo. , 1974, 97, p. 506.
Minerals of Colorado (1997) Eckels, E. B.
      • Nathrop
USGS Bull 1716C
      • Poncha Pass Area
Minerals of Colorado (1997) Eckels, E. B.
      • Sedalia District
("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); U.S. Geological Survey Professional Paper 829
      • Turret District
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Clear Creek Co.
      • Idaho Springs District
Minerals of Colorado (1997) E.B. Eckels
      • Lamartine District
U.S. Geological Survey Professional Paper 319
Minerals of Colorado (1997) Eckels, E. B.; U.S. Geological Survey Professional Paper 223; U.S. Geological Survey Professional Paper 319
    • Conejos Co.
      • Manassa
"Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
    • Custer Co.
      • Rosita District
Minerals of Colorado (1997) E.B. Eckels
    • Douglas Co.
      • Castle Rock Area
[var: Wood Opal] Minerals of Colorado (1997) E.B. Eckels
    • Eagle Co.
      • Wolcott
[var: Opal-AN] collected specimens by Alan Goldstein.
    • El Paso Co.
      • Mount Rosa
Minerals of Colorado (1997) E.B. Eckels
    • Fremont Co.
      • McIntyre Hills Area
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Prof. Paper 227
      • Tallahassee Creek District
[var: Wood Opal] Minerals of Colorado (1997) E.B. Eckels; USGS OFR 84-219
[var: Wood Opal] Minerals of Colorado (1997) E.B. Eckels; USGS OFR 84-219
    • Garfield Co.
      • Colorado River
[var: Opal-AN] Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) Eckel, E. B.
    • Grand Co.
[var: Opal-AN] Minerals of Colorado (1997) E.B. Eckels
    • Gunnison Co.
[var: Opal-AN] Minerals of Colorado (1997) E.B. Eckels
      • Vulcan District (Cebolla District; Domingo District)
        • Vulcan
Minerals of Colorado (1997) E.B. Eckels
      • White Earth District (Powderhorn District)
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Hinsdale Co.
      • Galena District (Henson Creek District)
Minerals of Colorado (1997) E.B. Eckels
      • Park District (Whitecross District; Burrows Park District; Adams District)
[var: Opal-AN] Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) Eckel, E. B.
    • Jefferson Co.
      • Clear Creek Canyon
Minerals of Colorado (1997) E.B. Eckels
      • Golden District
        • Golden
Minerals of Colorado (1997) E.B. Eckels
Rocks & Minerals 79:4
MinRec 19:153
    • Lake Co.
      • Leadville District
        • Leadville
The Oxidized Zinc Ores of Leadville Colorado, G. F. Loughlin, 1918
          • Breece Hill
The Oxidized Zinc Ores of Leadville Colorado, G. F. Loughlin, 1918
    • Larimer Co.
[var: Opal-AN] Minerals of Colorado (1997) E.B. Eckels
      • Rocky Mountain National Park
Minerals of Colorado (1997) E.B. Eckels
    • Mesa Co.
      • Fruita
Minerals of Colorado (1997) E.B. Eckels
[var: Wood Opal] Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) Eckels, E. B.
    • Mineral Co.
      • Creede District
Minerals of Colorado (1997) Eckels, E. B.
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) E.B. Eckels
    • Moffat Co.
      • Douglas Mountain District
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) E.B. Eckels
      • Maybell District
        • Maybell Mines
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) E.B. Eckels
    • Park Co.
      • South Park
        • Antero Junction
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) E.B. Eckels
    • Rio Blanco Co.
Minerals of Colorado (1997) Eckels, E. B.
    • Saguache Co.
Rocks & Minerals (July-August, 2002)
[var: Opal-AN] Minerals of Colorado (1997) E.B. Eckels
    • San Juan Co.
Desborough, G. A., Smith, K. S., Lowers, H. A., Swayze, G. A., Hammarstrom, J. M., Diehl, S. F., Leinz, R. W. and Driscoll, R. L. (2010): Mineralogical and chemical characteristics of some natural jarosites. Geochimica et Cosmochimica Acta, 74, 1041-1056.
    • Summit Co.
      • Montezuma Area
Minerals of Colorado (1997) E.B. Eckels
    • Teller Co.
American Mineralogist (1982): 67: 184.
      • Bull Hill
        • Blue Bird Mine
Rob Lavinsky (ex. Rochard Kosnar specimen)
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) Eckels, E. B.
Min Rec 36:2 pp143-185
[var: Wood Opal] Minerals of Colorado (1997) E.B. Eckels
    • Weld Co.
      • Stoneham
Minerals of Colorado (1997) Eckel, E. B.
    • Yuma Co.
      • Republican River
[var: Moss Opal] Minerals of Colorado (1997) E.B. Eckels
  • Connecticut
    • Fairfield Co.
      • Bethel
[var: Opal-AN] Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
      • Brookfield
[var: Opal-AN] Januzzi, Ronald E. (1994), Mineral Data Book - Western Connecticut and Environs. The Mineralogical Press, Danbury, Connecticut.
      • Danbury
[var: Opal-AN] Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury, Connecticut: 192-201.
Rocks & Minerals (1995) 70:396-409
      • Newtown
        • Hawleyville
[var: Opal-AN] Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
      • Redding (Reading)
        • Branchville
[var: Opal-AN] Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; Januzzi (1994) Mineral Data Book
[var: Opal-AN] Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
[var: Opal-AN] Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
      • Trumbull
        • Long Hill
[var: Opal-AN] Januzzi, Ronald E. (1976): Mineral Localities of CT and Southeastern NY State. The Mineralogical Press, Danbury, Connecticut.
[var: Opal-AN] field trip report, Garnet Gazette, December 2004, p 3.
    • Hartford Co.
      • Glastonbury
[var: Opal-AN]
        • South Glastonbury
[var: Opal-AN] Betts, John. (1999): The Quarries and Minerals of the Dayton Road District, South Glastonbury, Connecticut. Rocks and Minerals. Volume 74, Number 2. pp. 110-121
[var: Opal-AN] Harold Moritz collection
[var: Opal-AN] Harold Moritz collection
[var: Opal-AN] Betts, John. (1999): The Quarries and Minerals of the Dayton Road District, South Glastonbury, Connecticut. Rocks and Minerals. Volume 74, Number 2. pp. 110-121.
[var: Opal-AN] P Cristofono collection, 2008
[var: Opal-AN] P. Cristofono collection
    • Litchfield Co.
      • Harwinton
[var: Opal-AN] A. Berluti Collection
[var: Opal-AN] Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
      • New Milford
        • Upper Merryall
[var: Opal-AN] Januzzi (1976): Mineral Localities of CT and Southeastern NY State
      • Roxbury
        • Mine Hill (Ore Hill)
[var: Opal-AN] Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
      • Thomaston
[var: Opal-AN] Januzzi, 1976. Mineral Localities of Connecticut and Southeastern New York State (Taylor Assoc./Mineralogical Press); Rocks & Minerals (1985) 60:119-124
      • Woodbury
[var: Opal-AN] Mike Polletta Observation
    • Middlesex Co.
[var: Opal-AN] Personally collected by A. Berluti in 2010
[var: Opal-AN] Collected by A. Berluti in 2009-11
      • East Hampton (Chatham)
        • Cobalt
[var: Opal-AN] Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
[var: Opal-AN] Field collected by Harold Moritz.
[var: Opal-AN] Schooner (1958 and 1961); Jones (1960)
[var: Opal-AN] Schooner (1958); Schooner (1961)
      • Haddam
        • Haddam Neck
[var: Opal-AN] Jones, Robert W. (1960): Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations.
        • Higganum
[var: Opal-AN] Former Don Miller collection
[var: Opal-AN] Former Don Miller collection
[var: Opal-AN] Kevin Czaja Collection
[var: Opal-AN] Kevin Czaja Collection
      • Middletown
        • White Rock District (White Rocks District)
[var: Opal-AN] Harold Moritz collection
[var: Opal-AN] Schooner (1958); Harold Moritz collection
      • Portland
[var: Opal-AN] Jones, Robert W. Jr., (1960), Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations. Fluorescent House. Branford, Connecticut.
        • Collins Hill
Januzzi, 1976. Mineral Localities of Connecticut and Southeastern New York State (Taylor Assoc./Mineralogical Press)
          • Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries)
[var: Opal-AN] Schooner, Richard. (1955): 90 Minerals from 1 Connecticut Hill. Rocks & Minerals: 30(7-8): 351-8.
[var: Opal-AN] Jones, Robert W. (1960) LUMINESCENT MINERALS OF CONNECTICUT, A GUIDE TO THEIR PROPERTIES AND LOCATIONS.
[var: Opal-AN] Jones, Robert W. (1960) Luminescent Minerals of Connecticut
[var: Opal-AN] Jones, Robert W. (1960): LUMINESCENT MINERALS OF CONNECTICUT,
[var: Opal-AN] Rocks & Minerals (1970) 45:595-600
    • New Haven Co.
Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
        • Southford
[var: Opal-AN] Ryerson, Kathleen H. (1972) Rockhouns Guide to Connecticut
      • Waterbury
[var: Opal-AN] Visually identified at a CT museum, with vivid green fluorescence
Bernstein, Lawrence (1976) Minerals of Washington D.C. and vicinity: U.S. Geological Survey: Open File Report 76-849, 183 p.
  • Florida
    • Hillsborough Co.
      • Tampa
        • Tampa Bay
Zeitner (1968) Appalachian Gem Trails
    • Polk Co.
      • Central Florida Phosphate District (Bone Valley)
        • Homeland
Marc V. Hurst (2012) Central Florida Phosphate District. Southeastern Geological Society Field Trip Guidebook No. 57
  • Georgia
    • Bartow Co.
      • Cartersville District
[var: Opal-AN] Rocks & Min.: 64:185.
    • Bibb Co.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Brooks Co.
[var: Wood Opal] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
    • Burke Co.
      • Girard District
[var: Opal-AN] Rocks & Min.: 64:187.
[var: Opal-AN] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
Gems and Minerals of America- Jay Ellis Ransom-1974
    • Columbia Co.
      • Augusta
[var: Opal-AN] Rocks & Min.:64:190.
[var: Opal-AN] Gems and Minerals of America- Jay Ellis Ransom-1974
      • Stone Mountain-Lithonia District
[var: Opal-AN] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
[var: Opal-AN] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
[var: Opal-AN] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
[var: Opal-AN] [www.johnbetts-fineminerals.com]
      • Cave Spring
[var: Opal-AN] Rocks & Min.:64:195; McCallie(1900).
Gems and Minerals of America- Jay Ellis Ransom-1974
Gems and Minerals of America- Jay Ellis Ransom- 1974
    • Rabun Co.
      • Burton
[var: Opal-AN] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
[var: Opal-AN]
[var: Wood Opal] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
[var: Wood Opal] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
      • Warthen
Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
    • White Co.
      • Cleveland
[var: Opal-AN] Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
  • Hawaii
    • Hawaii Co. (Hawaii Island)
Hon, K., Bove, D.J., Lee, L., and Thornber, C., 2009, The origin and zonation of sublimates and precipitates in active Hawaiian lava tubes: Geological Society of America Abstracts with Programs, v. 41, no. 7, p.193.
    • Honolulu Co.
      • Oahu Island
        • Kailua
Fujishima, K.Y. and Fan, P-F (1977) Hydrothermal mineralogy of Keolu Hills, Oahu, Hawaii. American Mineralogist, 62, 574-582.
  • Idaho
    • Ada Co.
      • Boise District
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Adams Co.
      • Indian Valley Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Boise Co.
      • Idaho City
Dake, 1956. NW Gem Trails, 2nd ed.
    • Camas Co.
      • Fairfield Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Clark Co.
      • Spencer
Extra Lapis - English No. 10 Opal
    • Custer Co.
      • Bay Horse District
        • Challis
[var: Opal-AN] John Cornish collection
Ream, Lanny R. 2004. Idaho Minerals, 2nd edition, Revised and Updated
Dake, 1956. NW Gem Trails, 2nd ed.
    • Elmore Co.
      • Glenns Ferry Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • King Hill Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Gem Co.
      • Cascade Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Emmett
The Mineralogist, v. 4, no. 1. p. 15, 15, 54.
    • Idaho Co.
C. Lemanski, Jr. (re-entry lost Mindat data).
      • Riggins
Ream, Lanny R. 2004. Idaho Minerals, 2nd edition, Revised and Updated; American Mineralogist, Volume 67, pages 799-803, 1982
    • Kootenai Co.
Dake, 1956. NW Gem Trails, 2nd ed.
    • Latah Co.
[var: Wood Opal] Dake, 1956. NW Gem Trails, 2nd ed.
The Moscow Opal Mines 1890 to 1893 (The First Commercial Opal Mines in the United States), Ron Brockett, 1975
Dake, 1956. NW Gem Trails, 2nd ed.
    • Lemhi Co.
      • Blackbird District
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Dake, 1956. NW Gem Trails, 2nd ed.
      • Salmon
[Precious Opal] Extra Lapis - English No. 10 Opal
    • Lincoln Co.
[var: Wood Opal] Dake, 1956. NW Gem Trails, 2nd ed.
    • Nez Perce Co.
Dake, 156. NW Gem Trails, 2nd ed.
USGS Bulletin 1720b
Dake, 1956. NW Gem Trails, 2nd ed.
      • French District
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Marsing Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Dake, 1956. NW Gem Trails, 2nd ed.
      • Reynolds Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Riddle Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Rough Mountain District
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Twin Falls Co.
      • Buhl Area
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Valley Co.
      • Big Creek District
        • Idaho Primitive Area
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Marble Creek District
        • Idaho Primitive Area
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Monumental Creek District
        • Idaho Primitive Area
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Washington Co.
      • Monroe District
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Weiser
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Weiser District
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
R&M 70:4 pp 242-263; USGS Bull 1042D
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
  • Indiana
    • Henry Co.
[var: Wood Opal] Erd, R. C. and S.S. Greenburg (1960) Minerals of Indiana. Indiana Geological Survey Bulletin 18 73pp
Erd, R. C. and S.S. Greenburg (1960) Minerals of Indiana. Indiana Geological Survey Bulletin 18 73pp
  • Kansas
[var: Moss Opal] Jay Ellis Ransom,1974, Gems and Minerals of America
[var: Moss Opal] Ransom, 1974. Gems and Minerals of America
[var: Moss Opal] Ransom, 1974. Gems and Minerals of America
Anderson (1994) Kentucky Geol. Survey Ser. XI Spec. Pub 20
  • Louisiana
    • Catahoula Parish
[var: Wood Opal] Earth Treasures Vol 4, Allan W. Eckert, 1987
    • Ouachita Parish
[var: Wood Opal] Jay Ellis Ransom,1974, Gems and Minerals of America
    • Vernon Parish
[Precious Opal] R&M 69:3 pp 156-162
  • Maine
    • Androscoggin Co.
      • Auburn
        • East Mount Apatite District
[var: Opal-AN] Bill Bunn
    • Cumberland Co.
      • Baldwin
        • West Baldwin
[var: Opal-AN] No reference listed
      • Casco
[var: Opal-AN] P Cristofono collection
[var: Opal-AN] King & Foord, 1994. Mineralogy of Maine, V. 1.
    • Knox Co.
      • Warren
No reference listed
    • Oxford Co.
      • Albany
King, V. (ed.), 2009, Maine feldspar, Families, and Feuds.
[var: Opal-AN] "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., ey.al., 1998
      • Buckfield
[var: Opal-AN] www.geocities.com/~stuarts1031/fluorescent4.html
      • Greenwood
[var: Opal-AN] "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., et.al., 1998
      • Newry
[var: Opal-AN] Harold Moritz collection
[var: Opal-AN] King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed.), 2000, Mineralogy of Maine, V. 2, with updates by Van King
[var: Opal-AN] King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2.
[var: Opal-AN] King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1; King, V, 2006, Minerals of Halls Ridge and Plumbago-Puzzle Mountain, Newry, Oxford County, Maine, Mineral News, v. 22 (6), p. 1-3.
      • Paris
[var: Opal-AN] King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
[var: Opal-AN]
      • Peru
[var: Opal-AN] No reference listed
      • Rumford
[var: Opal-AN] No reference listed
      • Stoneham
[var: Opal-AN] A.Mathauser collection
    • Sagadahoc Co.
      • Topsham
[var: Opal-AN] Rocks & Min.: 62:413.
[var: Opal-AN] Van King
[var: Opal-AN] "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., et.al., 1998
  • Maryland
    • Baltimore Co.
      • Delight
Pearre, N. & A. V. Heyl (1960) Mineral deposits in serpentine rocks of the Piedmont Upland, Maryland, Pennsylvania and Delaware: U. S. Geological Survey: Bulletin 1082K: 707-833.
        • Soldiers' Delight ridge
Rocks & Min.:11:111; 19:148.
    • Calvert Co.
[var: Diatomite] U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Cecil Co.
      • Pilot
Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
    • Harford Co.
      • Cardiff
[var: Opal-AN] Minerals of Maryland (1940) Charles Ostrander and Walter E. Price, Jr., Natural History Society of Maryland. p. 56
[var: Opal-AN] Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
    • Montgomery Co.
      • Rockville
minerals of washington d.c. area; L.R. Bernstein
[var: Opal-AN] Cordua, Bill (1969) Mineralogy of a newly exposed granite near White Oaks, MD: Rocks and Minerals: 44 (2): 114-115.
  • Massachusetts
    • Berkshire Co.
[var: Opal-AN] Gleba, 1978. Mass. Mineral & Fossil Localities
    • Essex Co.
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
[var: Opal-AN] P Cristofono collection , 2009
[var: Opal-AN] P. Cristofono collection 2011
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Newbury
[var: Opal-AN] P. Cristofono collection 2011
      • North Andover
[var: Opal-AN] P Cristofono collection , 2009
[var: Opal-AN] P Cristofono collection , 2009
    • Franklin Co.
      • Deerfield
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities; Emerson, B. K (1882) The Deerfield Dyke and its minerals. American Journal of Science 3rd series XXIV:270-278,349-359.
[var: Opal-AN] Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).
[var: Opal-AN] Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).
    • Hampden Co.
      • Monson
[var: Opal-AN] Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).
    • Hampshire Co.
      • Easthampton
Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Granby
[var: Opal-AN] P Cristofono collection
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Ashland
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Dracut
[var: Opal-AN] P. Cristofono collection, 2013
      • Holliston
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Hudson
[var: Opal-AN] P Cristofono collection 2010
      • Marlborough
[var: Opal-AN] P Cristofono collection, 2006
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Weston
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Woburn
[var: Opal-AN] Januzzi, 1976. Mineral Localities of Connecticut and Southeastern New York State (Taylor Assoc./Mineralogical Press). Chapter: "Massachusetts Mineral Localities," p206; Rocks & Min.: 21:75.
    • Norfolk Co.
      • Wrentham
No reference listed
    • Suffolk Co.
      • Boston
        • West Roxbury
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
    • Worcester Co.
      • Bolton
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Fitchburg
[var: Opal-AN] P Cristofono collection
[var: Opal-AN] P Cristofono collection , 2009
      • Hardwick
[var: Opal-AN] Gleba, 1978. Massachusetts Mineral & Fossil Localities
      • Leominster
[var: Opal-AN] P. Cristofono collection
[var: Opal-AN] T Mortimer collection
[var: Opal-AN] P Cristofono collection
  • Mississippi
Journal of the Mississippi Academy of Sciences, Jan. 2004
    • Tippah Co.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
  • Missouri
    • Camden Co.
R&M 73:2 pp 98-117
    • Jackson Co.
Rocks & Min., March 1998.
    • Wayne Co.
[var: Opal-AN] R&M 73:2 pp 98-117
  • Montana
[var: Wood Opal] Jay Ellis Ransom,1974, Gems and Minerals of America
    • Fergus Co.
      • South Moccasin Mts
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Jay Ellis Ransom,1974, Gems and Minerals of America
Rob Lavinsky specimen
    • Lewis and Clark Co.
      • Blue Cloud District
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Madison Co.
      • Lower Hot Springs District (Norris District)
USGS Bull 574
    • Ravalli Co.
WC van Laer, 2009
    • Wibaux Co.
Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240; Chris Tucker and John Betts specimens.
  • Nebraska
[var: Wood Opal]
[var: Wood Opal]
[var: Wood Opal] The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
[var: Wood Opal]
[var: Wood Opal] The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Cuming Co.
[var: Wood Opal] Rocks & Minerals (1955) 30:372
    • Custer Co.
[Precious Opal] The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
Zeitner (1956), Midwest Gem Trails
    • Dodge Co.
[var: Wood Opal] The Minerals and Gemstones of Nebraska CSD U Neb EC 2
[var: Moss Opal] Jay Ellis Ransom,1974,Gems and Minerals of America
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
[Precious Opal] The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
[var: Wood Opal] The Minerals and Gemstones of Nebraska CSD U Neb EC 2
[var: Wood Opal]
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Morrill Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
MacFall (1975) Gem Hunter's Guide
[var: Wood Opal] Jay Ellis Ransom,1974,Gems and Minerals of America
[var: Wood Opal] Jay Ellis Ransom,1974,Gems and Minerals of America
[var: Wood Opal] Jay Ellis Ransom,1974,Gems and Minerals of America
  • Nevada
    • Carson City
      • Delaware District
[var: Wood Opal] NBMG Spec. Pub. 31 Minerals of Nevada
    • Churchill Co.
[var: Geyserite] LUTZ, Susan Juch EPISODIC HOT SPRING ACTIVITY AND PALEOSEISMOLOGY OF THE DIXIE VALLEY FAULT IN NORTHERN DIXIE VALLEY, NEVADA GSA Rocky Mountain - 54th Annual Meeting (May 7–9, 2002)
NBMG Spec. Pub. 31 Minerals of Nevada
      • Dixie Valley District
Econ Geol (1994) 89:707-719
      • Leete District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Wild Horse District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Clark Co.
      • Gold Butte District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Muddy Mts
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
      • Virgin Mts
NBMG Spec. Pub. 31 Minerals of Nevada
    • Elko Co.
      • Coal Mine District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
      • Contact District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
      • Delano District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
      • Ferber District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Gold Circle District (Midas District)
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
      • Huntington Creek District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; American Mineralogist (1988): 73: 145-152.; USGS Open-File Report 76-56
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; Am Min 64:3-4 pp 1026-1038; NBMG Open File report 83-9
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
[var: Opal-AN] NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
      • Kinsley District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
      • Loray District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
USGS Open-File Report 76-56
      • Mud Springs District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Pequop District
NBMG Spec. Pub. 31 Minerals of Nevada
USGS Bull 1162B
      • Rock Creek District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
      • Ruby Valley District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Scraper Springs District
NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
    • Esmeralda Co.
      • Cuprite District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Fish Lake Marsh
[var: Opal-AN] American Mineralogist 19:268-274
      • Fish Lake Valley District
NBMG Spec. Pub. 31 Minerals of Nevada; Am Min 64:3-4 pp 1026-1038
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
      • Montezuma District
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
      • Red Mountain District
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
      • Silver Peak Range
NBMG Spec. Pub. 31 Minerals of Nevada
      • Tonopah District
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
NBMG Bull 78 Geology and Mineral Deposits of Esmeralda County, Nevada
    • Eureka Co.
      • Beowawe District
NBMG Spec. Pub. 31 Minerals of Nevada; USGS Bull 1998
      • Carlin Trend
        • Maggie Creek Subdistrict
MinRec 26(5):449-469.
      • Grass Valley
NBMG Spec. Pub. 31 Minerals of Nevada
      • Lynn District
[var: Opal-AN] NBMG Spec. Pub. 31 Minerals of Nevada
    • Humboldt Co.
      • Awakening District
Econ Geol (1994) 89:628-638; USGS Bull 2090
      • Donnelly District
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
      • National District
Econ Geol (1985) 80:360-393
      • Opalite District
NBMG Bull 59 Geology and Mineral Resources of Humboldt County, Nevada
      • Osgood Mts
        • Potosi District
Min Rec 10:4 pp219-221
      • Rabbit Hole (Sulfur; Sulphur) District
Adams, George I. The Rabbit Hole Sulphur Mines Near Humboldt House, Nev. In: Contributions to Economic Geology 1903 United States Geological Survey Bulletin 225 Government Printing Office, Washington DC 1904
Adams, George I. The Rabbit Hole Sulphur Mines Near Humboldt House, Nev. In: Contributions to Economic Geology 1903 United States Geological Survey Bulletin 225 Government Printing Office, Washington DC 1904
      • Santa Rosa Range
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
      • Sulphur District
        • Sulphur
Econ Geol (1997) 92:578-600
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG files No. 50600003; Nevada Bureau of Mines and Geology NBMG Open-File Report 96-3 By Stephen B. Castor, Christopher D. Henry, Lisa A. Shevenell
USGS Bull 1538D
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada; USGS Bull 1538D
[Precious Opal] Christopher Wentzell
[Precious Opal] Eckert, Allen W. (1997) The World of Opals. (John Wiley & Sons, New York). p. 312,310.
USGS Bull 1538D
Christopher Wentzell collection.
USGS Bull 1538D
[Precious Opal] Christopher Wentzell
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
[var: Jelly Opal] NBMG Spec. Pub. 31 Minerals of Nevada; Extra Lapis - English No. 10 Opal
[Precious Opal] USGS Bull 1538D
USGS Bull 1538D
USGS Bull 1538D
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
[Precious Opal] Christopher Wentzell;
NBMG Spec Pub 31 Minerals of Nevada
        • WRT Stonetree group
Christopher Wentzell collection.
Sinkankas, John (1959) Gemstones of North America. Figure 30 at page 116.
[Precious Opal] Christopher N. Wentzell
[Precious Opal] various contributors (2013) Nevada-Jackpot! Mineral Monograph 18, Lithographie LLC, 59
    • Lander Co.
      • Battle Mountain District
USGS Bull 2009
      • Birch Creek District
Garside NBMG Bull 81 (1973); Nevada Bureau of Mines and Geology Online Documents OF06-19 - Nevada Uranium and Thorium Occurrences
Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp303-319.
Fries, Carl, Jr., Tin deposits of northern Lander County, Nevada. USGS Bulletin 931-L, p. 279-294, illus., 1942.
NBMG Bull 80 Geology and Mineral Deposits of Lander County, Nevada
NBMG Bull 80 Geology and Mineral Deposits of Lander County, Nevada
NBMG Bull 80 Geology and Mineral Deposits of Lander County, Nevada
      • Reese River District
Jensen, M. and J. Herrmann (2012) Uranium mineralization at the Apex Mine, Lander County, Nevada. Rocks and Minerals 87:270-276
      • Shoshone Mts
David A. John, Albert H. Hofstra, Robert J. Fleck, Jon E. Brummer, and Eric C. Saderholm (2003)Geologic setting and genesis of the Mule Canyon low-sulfidation epithermal gold-silver deposit, north-central Nevada (in Gold deposits in northern Nevada; Part 1, Regional studies and epithermal deposits). Economic Geology and the Bulletin of the Society of Economic Geologists 98(2):425-463
      • Spencer Hot Springs District
Williams, S. A. (1988): Pottsite, a new vanadate from Lander County, Nevada. Mineralogical Magazine: 52: 389-390; Mineralogical Magazine 1988 52 : 389-390
    • Lincoln Co.
      • Chief District
NBMG Bull 73 Geology and Mineral Resources of Lincoln County, Nevada
      • Mormon Mts
        • Mormon Mountains District
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp303-319.
    • Lyon Co.
      • Fernley
NBMG Spec. Pub. 31 Minerals of Nevada
      • Singatse Range
        • Yerington District
NBMG Spec. Pub. 31 Minerals of Nevada
          • Ludwig
NBMG Spec. Pub. 31 Minerals of Nevada
    • Mineral Co.
Van King
      • Fitting District
NBMG Bull 58 Geology and Mineral Resources of Mineral County, Nevada
      • Rawhide District
NBMG Bull 58 Geology and Mineral Resources of Mineral County, Nevada
      • Red Ridge District
[var: Wood Opal] NBMG Spec. Pub. 31 Minerals of Nevada
[var: Wood Opal] NBMG Spec. Pub. 31 Minerals of Nevada
    • Nye Co.
      • Bare Mountain
Rob Lavinsky specimen
          • Beatty
NBMG Bull 77 Geology and Mineral Resources of Southern Nye County, Nevada
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 558.
USGS Bull 620D
NBMG Spec. Pub. 31 Minerals of Nevada
USGS Bull 620D
USGS Bull 620D
NBMG Bull 77 Geology and Mineral Resources of Southern Nye County, Nevada
NBMG Bull 77 Geology and Mineral Resources of Southern Nye County, Nevada
      • Paradise Range
        • Gabbs District
NBMG Spec. Pub. 31 Minerals of Nevada
        • Paradise Peak District
Econ Geol (1994) 89:1228-1248
      • San Antonio Mts
Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp351-359
          • Tonopah
[var: Opal-AN] NBMG Spec. Pub. 31 Minerals of Nevada
[var: Opal-AN] NBMG Spec. Pub. 31 Minerals of Nevada
      • Shoshone Mts
        • Jackson District
NBMG Spec. Pub. 31 Minerals of Nevada
[Precious Opal] NBMG Spec. Pub. 31 Minerals of Nevada
      • Toquima Range
        • Manhattan District
          • Manhattan
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
        • Northumberland District
MinRec 16(1):37-41.
NBMG Spec. Pub. 31 Minerals of Nevada; Nevada Bureau of Mines and Geology NBMG Open-File Report 96-3 By Stephen B. Castor, Christopher D. Henry, Lisa A. Shevenell
    • Pershing Co.
      • Antelope District
        • Lovelock
[var: Opal-AN] NBMG Spec. Pub. 31 Minerals of Nevada
      • Buena Vista Valley
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
      • Nightingale District
[var: Opal-AN] Larry J, Garside (1973). Radioactive mineral occurrences in Nevada. p. 94
    • Storey Co.
      • Castle Peak District
NBMG Bull 70 Geology and Mineral Resources of Washoe and Storey Counties, Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
    • Washoe Co.
[var: Wood Opal] NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
      • Pyramid District
NBMG Spec. Pub. 31 Minerals of Nevada; Nevada Bureau of Mines and Geology NBMG Open-File Report 96-3 By Stephen B. Castor, Christopher D. Henry, Lisa A. Shevenell
NBMG Bull 70 Geology and Mineral Resources of Washoe and Storey Counties, Nevada
NBMG Bull 70 Geology and Mineral Resources of Washoe and Storey Counties, Nevada
      • Pyramid Lake
NBMG Spec. Pub. 31 Minerals of Nevada
      • San Emidio District
NBMG Bull 70 Geology and Mineral Resources of Washoe and Storey Counties, Nevada
MinRec 16(1):25-31
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Bull 70 Geology and Mineral Resources of Washoe and Storey Counties, Nevada
[var: Wood Opal] NBMG Spec. Pub. 31 Minerals of Nevada
    • White Pine Co.
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Hampshire
    • Carroll Co.
      • Albany
[var: Opal-AN] Rocks & Min. 80:243
[var: Opal-AN] No reference listed
      • Hale's Location
[var: Opal-AN] P Cristofono collection, 2010
[var: Opal-AN] Smith, Art. "New Hampshire: mineral locality index " in Rocks & Min., July-Aug 2005
[var: Opal-AN]
    • Cheshire Co.
      • Marlow
[var: Opal-AN] P. Cristofono collection, 2012
      • Surry
Van King
      • Walpole
[var: Opal-AN] P. Cristofono, T. Mortimer, J.W. Nizamoff, A. Wilken, and R. Wilken (2011) The 38th Rochester Mineralogical Symposium, April 14-17, 2011, lecture abstracts, page 17-18.
    • Grafton Co.
      • Bethlehem
Rocks & Minerals Vol.65 No.4; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
      • Groton
[var: Opal-AN] Whitmore & Lawrence, 2004. The Pegmatite Mines Known As Palermo, p.187
    • Hillsborough Co.
[var: Opal-AN] P. Cristofono collection 2011
[var: Opal-AN] P. Cristofono collection
[var: Opal-AN] P Cristofono collection; P Cristofono collection
[var: Opal-AN] P Cristofono collection
      • Wilton
[var: Opal-AN] P. Cristofono collection
    • Merrimack Co.
      • Hooksett
[var: Opal-AN] P. Cristofono collection 2011
    • Rockingham Co.
      • Fremont
[var: Opal-AN] P Cristofono collection , 2009
[var: Opal-AN] P. Cristofono collection, 2012
      • Salem
[var: Opal-AN] P. Cristofono collection 2011
      • Windham
[var: Opal-AN] P. Cristofono collection, 2010
    • Strafford Co.
      • Strafford
        • Parker Mountain
[var: Opal-AN] Rocks & Min.:64:504.; Rocks & Minerals 80:4 pp234-241
    • Sullivan Co.
      • Acworth
[var: Opal-AN] Jeremy Zolan Collection
      • Springfield
[var: Hyalite] P. Cristofono collection, 2015
  • New Jersey
    • Essex Co.
      • Montclair Township
        • Upper Montclair
Mins. of NYC & Its Environs, NY Min. Club (1931), Manchester, J.G.; Rocks & Min.: 59-157-183 (1984), Peters, Joseph J.
      • Verona Township
[var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 96.
    • Hudson Co.
      • Bergen Hill
        • Weehawken
[var: Opal-AN] The Minerals of New York City and Its Environs, NY Mineralogical Club (1931), Manchester, J.G.; Canfield (1889).
      • Jersey City
        • Bergen Hill
          • Mt Pleasant
[var: Opal-AN] Mins. of NYC & Its Environs, NY Min. Club., Vol. 3 (1931), edited by J.G. Manchester
    • Mercer Co.
      • West Windsor Township
[var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 88.
    • Middlesex Co.
The Minerals of NYC & Its Environs, NY Min. Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 71.
    • Morris Co.
      • Mount Olive Township
[var: Opal-AN] NJ State Geol. Ann. Rpt. (1856):175.
      • Randolph Township
        • Succasunna
[var: Isopyre] No reference listed
      • Rockaway Township
The Iron Mines of NJ (1910), Bayley:404; NJ State Geol. Ann. Rpt (1856):197.
    • Passaic Co.
      • Little Falls Township
        • Great Notch
Mins. of NYC & Environs, NY Min. Club (1931), Manchester.
      • Paterson
[var: Opal-AN] American Muiseum of Nat. History, NY, specimen(s); Paterson, NJ, Museum specimens; Rocks & Min.: 59:157-183, Peters, Joseph J. (1984).
    • Somerset Co.
      • Bernards Township
Kent, B.P. and Butkowski, B. (2000): Minerals of the Millington Quarry, Somerset County, New Jersey. Mineralogical Record, 31: 411.
      • Warren Township
A Quest for New Jersey Minerals, Robert Speiser(1978):10.
    • Sussex Co.
      • Byram Township
        • Cranberry Lake
[var: Opal-AN] collected by David Bernstein- 10/2009
      • Franklin Mining District
        • Ogdensburg
Kuitems, Steven, Orosz, Joe, and Nikischer, Tony (2009) Mineral #357 Found at Franklin, NJ, Picking Table v50 (1), p 17.
    • Union Co.
The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931):94.
    • Warren Co.
      • Franklin Township
Yale Peabody Museum 3979
The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 76.
  • New Mexico
    • Bernalillo Co.
[var: Wood Opal] Minerals of New Mexico 3rd ed.
    • Catron Co.
Minerals of New Mexico 3rd ed.
NMGS 37th Field Conference
NMGS 37th Field Conference
        • Sawmill Creek
NMGS 37th Field Conference
    • Cibola Co.
      • Laguna District
NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region; Moench, Robert Hadley; Schlee, John Stevens (1967) Geology and uranium deposits of the Laguna district, New Mexico. USGS Prof. Paper 519
    • Colfax Co.
      • Springer
        • Point of Rocks Mesa (Pecks Mesa)
[var: Opal-AN] Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
    • Doña Ana Co.
      • Rincon District
Minerals of New Mexico 3rd ed.
    • Eddy and Lea Counties
Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
    • Grant Co.
Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
Minerals of New Mexico 3rd ed.
Minerals of New Mexico 3rd ed.
        • Tyrone Area
NMBMMR Bull 83 Mineral Deposits of Western Grant County, New Mexico
      • Cap Rock Mountain District
NMBMMR Bull 83 Mineral Deposits of Western Grant County, New Mexico
Minerals of New Mexico 3rd ed.
[Precious Opal] Minerals of New Mexico 3rd ed.
[var: Fiorite] Minerals of New Mexico 3rd ed.
      • Pinos Altos District
[var: Opal-AN] Identified on specimens obtained at 2009 Tucson micromount symposium
Minerals of New Mexico 3rd ed.
      • White Signal District
[var: Opal-AN] Minerals of New Mexico 3rd ed.
NMBMMR Bull 83 Mineral Deposits of Western Grant County, New Mexico
    • Hidalgo Co.
[var: Opal-AN] Minerals of New Mexico 3rd ed.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Minerals of New Mexico 3rd ed.
Minerals of New Mexico 3rd ed.
      • Peloncillo Mts
        • San Simon District
USGS Prof Paper 68 The Ore Deposits of New Mexico
Northrop, Minerals of New Mexico, 3rd rev. ed., 1996
[var: Opal-AN] Minerals of New Mexico 3rd ed.
    • Luna Co.
      • Little Florida Mountains District
http://www.emnrd.state.nm.us/nmparks/PAGES/parks/rockh/rockh.htm
    • McKinley Co.
Minerals of New Mexico 3rd ed.
    • Otero Co.
      • Cornudas Mts
Laszlo Horvath collection
    • Rio Arriba Co.
Northrop, Minerals of New Mexico, 3rd rev. Ed., 1996
    • San Juan Co.
Minerals of New Mexico 3rd ed.
    • Sandoval Co.
[Precious Opal] NMBMMR Bull 81 Summary of the Mineral Resources of Bernalillo, Sandoval, and Santa Fe Counties, New Mexico
Minerals of New Mexico 3rd ed.
[var: Opal-AN] Minerals of New Mexico 3rd ed.
[var: Wood Opal] Minerals of New Mexico 3rd ed.
    • Santa Fe Co.
NMBMMR Bull 81 Summary of the Mineral Resources of Bernalillo, Sandoval, and Santa Fe Counties, New Mexico
Minerals of New Mexico 3rd ed.
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
[var: Opal-AN] Minerals of New Mexico 3rd ed.
NMBMMR New Mexico Mineral symposium (2004)
    • Sierra Co.
[var: Opal-AN] Ron Gibbs
Minerals of New Mexico 3rd ed.; USGS Bull 945C
The Mineralogist, v. 9, no. 5, p. 181.
      • Paramount Canyon
[var: Opal-AN] Minerals of New Mexico 3rd ed.
Minerals of New Mexico 3rd ed.
[var: Opal-AN] Minerals of New Mexico 3rd ed.
NMBMMR OFR 19
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
[var: Opal-AN] Minerals of New Mexico 3rd ed.
[var: Opal-AN] Minerals of New Mexico 3rd ed.
    • Socorro Co.
[var: Wood Opal] Minerals of New Mexico 3rd ed.
Northrop, Minerals of New Mexico, 3rd Rev. ed., 1996
Minerals of New Mexico 3rd ed.
Minerals of New Mexico 3rd ed.
Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
[var: Fiorite] Minerals of New Mexico 3rd ed.
    • Taos Co.
      • No Agua District
Ramon DeMark and Jessie Kline, New Mexico Mineral Symposium, November 2000
NMBMMR New Mexico Mineral symposium (2000) p.11
Minerals of New Mexico 3rd ed.
[var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 84.
    • Broome Co.
      • Deposit
[var: Opal-AN] Rocks & Min.: 20:61.
    • Essex Co.
      • Crown Point Township
[var: Opal-AN] Jensen (1978) Minerals of New York State
John H. Betts (2009) "The minerals of New York City", Rocks & Minerals, 84, 204-240.
      • Manhattan (New York Co.)
        • Manhattan Island
[var: Opal-AN] Alfredo Petrov, field observations on material displaced during hurricane Irene, August 2011.
    • Orange Co.
      • Town of Warwick
        • Amity
Glenn Rhein
        • Edenville
          • Edenite Hill
[var: Opal-AN] Van King
    • Putnam Co.
      • Philipstown Township
        • Anthony's Nose
[var: Opal-AN] Rocks & Min.:8:61-65.
      • Southeast Township
        • Brewster
[var: Opal-AN] Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p223-224
      • Town of Putnam Valley
[var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 87.
      • Town of Southeast
        • Brewster
Jensen (1978) Minerals of New York State, 42-43 (Januzzi, 1966, 1989) (Trainer, 1938).
    • St. Lawrence Co.
      • De Kalb Township
        • Bigelow
Rocks & Minerals 85:250-259
    • Westchester Co.
[var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 65.
[var: Opal-AN] Rocks & Min.:11:66; 23:712.
[var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 39 & 45-46.
      • Cortlandt Township
        • Montrose
Rocks & Min.:8:39.
        • Toddville
[var: Opal-AN] Rocks & Min.: 7:91; 8:38.
      • Harrison
[var: Opal-AN] Rocks & Min.: 6:101 & 9:136-137.
      • Peekskill
        • Camp Smith
[var: Opal-AN] Rocks & Min.: 8:40.
[var: Opal-AN] Rocks & Min.:7:148 & 8:40.
[var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 98.
  • North Carolina
[var: Opal-AN] Genth,Frederick Augustus (1891) The Minerals Of North Carolina;USGS Bulletion No.74
Gems and Minerals of America-Jay Ellis Ransom-1974
      • Charlotte Belt
Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84
[var: Opal-AN] Pratt,Joseph Hyde.,(1933) Gems and Gem Minerals of North Carolina: American Mineralogist,Vol.18,No.4,April,1933
    • Caldwell Co.
Luke Osborne states that he collected opal from this locality.
    • Clay Co.
[var: Opal-AN] Pratt,Joseph Hyde.,1933,Gems and Gem Minerals of North Carolina: American Mineralogist: Vol.18,No.4,April,1933
    • Cumberland Co.
      • Fayetteville
Gems and Minerals of America- Jay Ellis Ransom-1974
    • Macon Co.
      • Cowee Valley
        • Ellijay District
          • Franklin
            • Corundum Hill
[var: Opal-AN] Ref.: Dana 6:499, 560 & 1077.
    • Madison Co.
      • Mars Hill
[var: Opal-AN] Rocks & Min.: 17:62
    • Mitchell Co.
      • Cane Creek Section
        • Bakersville
          • Pizzle Mtn