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Opal

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Formula:
SiO2 · nH2O
Colour:
Colourless, white, ...
Lustre:
Vitreous, Waxy, Greasy, Dull
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 a modern commentary by Kostov (2008) questions 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.

Studies at low temperature show that water molecules way be organized into ice-like structure, which includes the cubic ice modification (Eckert et al., 2015).


Visit gemdat.org for gemological information about Opal.


Classification of Opal

Approved, 'Grandfathered' (first described prior to 1959)
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

Physical Properties of Opal

Vitreous, Waxy, Greasy, Dull
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colourless, 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
Elements listed in formula:
Analytical Data:
Contains 2 - 10% water.

Occurrences of Opal

Relationship of Opal to other Species

4.DA.Carbon Dioxide IceCO2
4.DA.05QuartzSiO2
4.DA.10TridymiteSiO2
4.DA.15CristobaliteSiO2
4.DA.20MogániteSiO2 · nH2O
4.DA.25MelanophlogiteC2H17O5 · Si46O92
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
7.8.7SilhydriteSi3O6 · H2O
7.8.9MogániteSiO2 · nH2O

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

Opal in petrology

An essential component of (items highlighted in red)
Common component of (items highlighted in red)

References for Opal

Reference List:
Jones, J.B., Segnit, E.R. (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., Yang, B.X. (1994) X-ray absorption spectroscopy of silicon dioxide (SiO2) polymorphs: the structural characterization of opal. American Mineralogist: 79: 622-632.

Weise, C., publisher (1996) Opal - extraLapis Nr.10. Christian Weise Verlag, München.

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, F., Ghisoli, C., Marinoni, L., Bordoni, V. (2013) Opal, a beautiful gem between myth and reality. Neues Jahrbuch für Mineralogie - Abhandlungen: 190: 1-9.

Eckert, J., Gourdon, O., Jacob, D.E., Meral, C., Monteiro, P.J.M., Vogel, S.C., Wirth, R., Wenk, H.-R. (2015) Ordering of water in opals with different microstructures. European Journal of Mineralogy: 27: 203-213.

Internet Links for Opal

mindat.org URL:
http://www.mindat.org/min-3004.html
Please feel free to link to this page.
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
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
Jose Zendrera collection
Algeria
 
  • Oran Province
    • Ouillis - Pont du Chelif area
Rocks & Min.: 17:243.
Angola
 
  • Luanda Province
Martins da Pedra collection
Antarctica
 
  • Eastern Antarctica
    • Victoria Land
      • Elephant Morraine
Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).
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
Tauber, Sebastian (2016) unpublished data on site visit.
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
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
    • Punilla Department
      • Tanti
        • Cerro Blanco pegmatite district
Alfredo Petrov field collected specimens, April 1993.
    • San Alberto Department
      • Mina Clavero
C. Lemanski, Jr. (re-entry of lost Mindat data).
    • Sobremonte department
      • El Tío
        • 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
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
    • Cochinoca Department
      • Rachaite
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.
Tauber, S. (2014). Visita a la zona, Noviembre de 2014.
  • Río Negro
    • Nueve de Julio department
      • Comicó
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
      • Deseado massif
        • Tres Cerros
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.
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.
  • 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
    • Ojo de Agua department
      • Piedras Blancas
[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
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.
      • Parque Nacional Campo de los Alisos
Collected by Sebastián Tauber, November 2016
    • Graneros Department
      • Cerro Quico
Raúl Jorge Tauber Larry
Raúl Jorge Tauber Larry
      • Amaicha del Valle District
Raúl Jorge Tauber Larry
Raúl Jorge Tauber Larry
Atlantic Ocean
 
  • Mid-Atlantic Ridge complex
Melekestseva, I. Y., Tret'yakov, G. A., Nimis, P., Yuminov, A. M., Maslennikov, V. V., Maslennikova, S. P., ... & Large, R. (2014). Barite-rich massive sulfides from the Semenov-1 hydrothermal field (Mid-Atlantic Ridge, 13° 30.87′ N): Evidence for phase separation and magmatic input. Marine Geology, 349, 37-54.
    • 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
 
  • Australian Capital Territory
    • Brindabella Range
      • Cotter River
[var: Opal-AN] McQueen, Ken G.; J. R. Caldwell; P. W. Millsteed (July 1988). "Primary and Secondary Minerals at the Paddy's River Mine, Australian Capital Territory". Australian Mineralogist 3: 83–100.
  • New South Wales
    • Bathurst Co.
      • Carcoar
Liversidge 1887, Minerals of New South Wales
    • Beresford Co.
      • Snowy Mts district
John Whitehouse (2015) Geologic Evolution of Miocene Diatomite Occurrences, New South Wales, Australia
    • 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).
    • Camden Co.
Wray, R.A.L. (2001): Alunite formation within silica stalactites from the Sydney Region, South-eastern Australia. International Journal of Speleology 40, 109-116.
    • Cumberland Co.
      • Prospect (Prospect Hill)
Tschernich, R. (1992): Zeolites of the World, P.48; Min Rec (1994) 25:185-194
    • Darling Co.
      • Barraba
Oskierski, H. C., Dlugogorski, B. Z., & Jacobsen, G. (2013). Sequestration of atmospheric CO 2 in chrysotile mine tailings of the Woodsreef Asbestos Mine, Australia: Quantitative mineralogy, isotopic fingerprinting and carbonation rates. Chemical Geology, 358, 156-169.
    • 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.
- 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.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003.
- 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
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003.
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.
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003, Len Cram.
aracic
Cram, L. (2004): A Journey with Colour, Vol 2, Part B - A History of Lightning Ridge Opal 1873-2003.
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.
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
http://www.walkinmine.com.au/ABOUT.php
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
    • Georgiana Co.
W. Curran (1896) Occurrence of precious stones in N.S.W. Journal and Proceedings of the Royal Society of New South Wales, 30, 214-271
    • Gowen Co.
      • Warrumbungle National Park
[var: Opal-AN] Jensen (1912) Proceedings of the Royal Society of Queensland p186
    • Macquarie Co.
      • Port Macquarie
    • 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.
Caucia, F., Ghisoli, C., Marinoni, L., & Bordoni, V. (2013). Opal, a beautiful gem between myth and reality. Neues Jahrbuch für Mineralogie-Abhandlungen: Journal of Mineralogy and Geochemistry, 190(1), 1-9.
      • Mehi
aracic
    • Pottinger Co.
Steve Sorrell Collection
[var: Opal-AN] Specimen in collection
    • Rous Co.
      • Teven
Warwick–Tweed Heads Exploration Data Package Vol. 2, Mineral occurrence data sheets, occurrence lists and mineral occurrence maps: R.E. Brown, H.F. Henley and W.J. Stroud, December, 2001. Published by the Geological Survey of New South Wales.
Mumme I.A. and Ball R.A. On the Genesis of Volcanic Opal at Houghlahan's Creek Near Teven-Tintenbar, New South Wales, Australian Mineralogist #8 Feb-Mar 1977.
Warwick–Tweed Heads Exploration Data Package Vol. 2, Mineral occurrence data sheets, occurrence lists and mineral occurrence maps: R.E. Brown, H.F. Henley and W.J. Stroud, December, 2001. Published by the Geological Survey of New South Wales.
Warwick – Tweed Heads Exploration Data Package Vol. 2, Mineral occurrence data sheets, occurrence lists and mineral occurrence maps: R.E. Brown, H.F. Henley and W.J. Stroud, December, 2001. Published by the Geological Survey of New South Wales.
      • Tintenbar
Warwick – Tweed Heads Exploration Data Package Vol. 2, Mineral occurrence data sheets, occurrence lists and mineral occurrence maps: R.E. Brown, H.F. Henley and W.J. Stroud, December, 2001. Published by the Geological Survey of New South Wales.; Smallwood, A. G., Thomas, P., & Ray, A. S. (2008). Comparative analysis of sedimentary and volcanic precious opals from Australia. Journal of Australasian Ceramic Society.
      • Tweed Heads
R.E. Brown, H.F. Henley and W.J. Stroud: Warwick–Tweed Heads Exploration Data Package Vol. 2, Mineral occurrence data sheets, occurrence lists and mineral occurrence maps, December, 2001. Published by the Geological Survey of New South Wales (GS2001/087).
      • Wyrallah
R.E. Brown, H.F. Henley and W.J. Stroud: Warwick–Tweed Heads Exploration Data Package Vol. 2, Mineral occurrence data sheets, occurrence lists and mineral occurrence maps, December, 2001. Published by the Geological Survey of New South Wales (GS2001/087).
    • St Vincent Co.
      • Ulladulla
    • Wentworth Co.
      • Wentworth
        • Kulcurna Station
Gill, E. D. (1973). Geology and geomorphology of the Murray River region between Mildura and Renmark, Australia. Memoirs of the National Museum of Victoria, 34, 1-97.
        • Nampoo Station
Segnit, E. R. (1973). Minerals from the Murray River region west of Wentworth, NSW, Australia. Memoirs of the National Museum of Victoria, Melbourne, (34), 195.
    • Yancowinna Co.
No reference listed
        • Broken Hill South Mine (BHS Mine; South Mine)
[var: Opal-AN] Australian Min. 3:1 (1997)
      • Northern Broken Hill Block
[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, S (1999) Rediscover Opals in Australia.
No reference listed
  • Northern Territory
    • Central Desert Region
    • Barcoo Shire
Natural History Museum, London
http://en.wikipedia.org/wiki/Jundah,_Queensland
http://en.wikipedia.org/wiki/Jundah,_Queensland
    • Burke Shire
      • Burketown
[var: Opal-AN]
    • Cloncurry Shire
      • Cloncurry
[var: Opal-AN] Graham Lee Collection
      • Rosebud Station
        • Mary Kathleen district
[var: Opal-AN] Personal collection and shown on photo
    • Gold Coast City Shire
      • Coolangatta
MacNevin A.A. & Holmes G.G. (1980) Gemstones. Geological Survey of New South Wales, Mineral Industry 18, 2nd edition
Hall, P. (1988) Australian Mineralogist, Vol 3, April-June 1988, pg. 65.
    • McKinlay Shire
      • McKinlay
    • Mount Isa City Shire
      • 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
    • Paroo Shire
    • Quilpie Shire
      • Kyabra
        • Keeroongooloo station
Rocks & Min.:8:15.
Rocks & Min.: 8:15.
Rocks & Min.:8:4.
Martins da Pedra collection
    • Sunshine Coast Region
    • Western Downs Region
      • Dalby
        • Kaimkillenbun
[var: Opal-AN]
    • Winton Shire
Rob Lavinsky specimen
  • South Australia
    • Central North
Georgina Gordon, Brian Morris & Josine Talbot (2014) Logging the Regolith Profile of Cooper Pedy, South Australia. in Geological Society of Australia, 2014 Australian Earth Sciences Convention (AESC), Sustainable Australia. Abstract No 110 of the 22nd Australian Geological Convention
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.].
      • Mobella Station
Lintern, M. J., & Sheard, M. J. (1999). Regolith studies related to the Challenger gold deposit, Gawler Craton, South Australia. CRC LEME.
      • Stuart Creek
Thiry, M., & Milnes, A. R. (1991). Pedogenic and groundwater silcretes at Stuart Creek opal field, South Australia. Journal of Sedimentary Research, 61(1).
    • 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
Grguric, B., Pring, A. & Drew, G. (1994), "The Burra Burra mine, Burra, South Australia", Mineralogical Record, vol. 25, no. 2, pp. 121-129.
        • Spalding
[var: Opal-AN] Personal collection of M. Willoughby.
      • South Mt Lofty Ranges (Adelaide Hills)
    • North West Province
      • Mintabie district
    • Northeast
[var: Opal-AN] Collection of M. Willoughby.
    • 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
    • Circular Head municipality
      • Cape Grim district
Everard, J. L., Calver, C. R., Pemberton, J., Taheri, J., & Dixon, G. (1997). Geology of the islands of southwestern Bass Strait. Tasmanian Geological Survey Record, 3.
      • Marrawah district
        • Redpa
http://www.crocoite.com/locationbulletins/part1/zeolites.pdf
    • Clarence City
      • Risdon
    • Devonport City municipality
      • Devonport district
[var: Opal-AN] http://www.crocoite.com/locationbulletins/part1/zeolites.pdf
    • Hobart city
      • Mt Nelson
Bottrill and Baker, 2008, Catalogue of Minerals of Tasmania
    • Huon Valley municipality
      • Huon-Channel region
Taheri, J., and Bottrill, R. S., 1998, Porphyry and Sedimentary-hosted Gold Deposits near Cygnet: New Styles of Gold Mineralisation in Tasmania: Unpub Rept, Mineral Resources Tasmania. 1999/01
        • Weld river district
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
      • Southern Islands
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
    • Northern Midlands municipality
      • Avoca-Royal George district
[var: Opal-AN] Mathew Latham collection
    • Tasman Municipality
R Bottrill collection
    • Waratah-Wynyard municipality
      • Waratah district
        • Waratah
Bottrill, unpub.
    • West Coast municipality
      • Trial Harbour district
R Bottrill, unpub.data; Bottrill, R.S., (2015) unpub consultant report, Mineral Resources Tasmania
  • Victoria
    • Campaspe Shire
      • Corop
[var: Opal-AN] crocoite.com
    • City of Ballarat
[var: Opal-AN] Steve Sorrell Collection
[var: Opal-AN] Toby Billing collection
    • City of Casey
      • Berwick
    • City of Greater Geelong
      • Anakie
[var: Opal-AN] Museum Victoria Mineralogy Collection
[var: Opal-AN] Museum Victoria Mineralogy Collection
    • City of Hume
[var: Opal-AN] Judy Rowe Collection
    • City of Latrobe
      • Yinnar
    • 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
    • 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.
    • East Gippsland Shire
      • Morass Creek gorge
[var: Opal-AN] Steve Sorrell collection
    • Hepburn Shire
[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
    • Loddon Shire
[var: Opal-AN] Ryan Eagle personal observation 2016
    • Macedon Ranges
[var: Opal-AN] Judy Rowe Collection
    • Macedon Ranges Shire
Alan Goldstein colln.
[var: Opal-AN] specimen in collection
[var: Opal-AN] ex Joan Lamond Collection
    • Mansfield Shire
      • 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] Birch, W.D. & Henry D.A. (1993) Phosphate Minerals of Victoria. The Mineralogical Society of Victoria - Special publication No.3 (192p) pp.83-90.
    • Southern Grampians Shire
[var: Opal-AN] Jon Mommers 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
    • Yarra Ranges Shire
      • Lilydale
[var: Opal-AN] Steve Sorrell Collection
    • Coolgardie Shire
      • Binneringie Station
Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
      • Coolgardie
        • Grosmont (Grossmont) district
Jacobson., M (2007), Pegmatites of WA
Fetherston, J. M., Stocklmayer, S. M. and Stocklmayer, V. C. (2013): Gemstones of Western Australia. Mineral Resources Bulletin 25, Geological Survey of Western Australia, Perth, Australia, 306 pp.
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
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
Kim McDonald collection
Fetherston, J., Stocklmayer, S., Stocklmayer, V., (2013): Gemstones of WA, Geological Survey of WA
    • East Pilbara Shire
      • Nullagine
Simpson, E.S. (1948), Minerals of Western Australia, Vol 2, p26
      • Weeli Wolli Creek Area
[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
Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
    • Kalgoorlie-Boulder Shire
      • Black Flag Goldfield
        • Grant's Patch
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
        • Mount Pleasant
De Broekert, P (2003). The Lady Bountiful Extended Gold Deposit Western Australia, CRC LEME, 2003
      • Bulong Goldfield
Feldtmann, F.R. (1919), The Magnesite Deposits of Bulong. North-East Coolgardie Goldfield, Geological Survey of Western Australia, Bulletin 82, 1919
Kim McDonald collection
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
      • Cowarna Downs Station
Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of Western Australia, Geological Survey of Western Australia
      • Mount Monger Goldfield
Kalgoorlie Miner newspaper (1920), Mt. Monger Field. Geological Report, 25/06/1920
    • Laverton Shire
      • Erilstoun Goldfield
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p 306 (assumed to be Banego Erilstoun in Simpson).
      • White Cliffs Station
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p321, 1948
    • Leonora Shire
      • Eulaminna (Murrin Murrin mining centre)
http://mrdate.usgs.gov/laterite/show-laterite.php?rec_id=8
    • Meekatharra Shire
      • Bulloo Downs Station
Marston, R.J. (1979) Copper Mineralization in Western Australia. Mineral Resources Bulletin 13, Geological Survey of Western Australia, 208p.
      • Milgun Station
Peter Downes, WA Museum
      • Mount Gould Station
Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V.C. (2013) Gemstones of Western Australia. Geological Survey of Western Australia, Mineral Resources Bulletin 25, 306p.
      • Mount Padbury Station
http://www.fairstarresources.com/mtpadbury.php
      • Sylvania Station
Grguric, B.A., Jones, S., Gray, S. (in press) Chromian clinochlore from Coobina, Pilbara Province, Western Australia. Australian Journal of Mineralogy.
    • Menzies Shire
Grguric, B.A., Pring, A., Bevan, A.W.R., Downes, P.J. (2006): The Minerals of Comet Vale Western Australia, Australian Journal of Mineralogy (2006):12: 9-23
Fetherston, J. M., Stocklmayer, S. M. and Stocklmayer, V. C. (2013): Gemstones of Western Australia. Mineral Resources Bulletin 25, Geological Survey of Western Australia, Perth, Australia, 133 pp.
      • Davyhurst Goldfield
        • Callion
Llorca, S.M. (1998), Mineralogy and Geochemistry of the Galsson Gold Deposit Callion Yilgarn Block Western Australia, CRC LEME, 1998
      • Diemals Station
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p 613
    • Mount Magnet Shire
      • Mount Magnet
        • East Magnet Goldfield
The Inquirer and Commercial News newspaper (Perth) (1895), Mount Magnet Fields, 20/12/1895
        • Lennonville Goldfield
The Inquirer and Commercial News newspaper (Perth) (1896), The Sensational Welcome Mine, 21/08/1896
    • Murchison Shire
      • Byro Station
Fetherston, J., Stocklmater, S., Stocklmayer, V(2013): Gemstones of WA, Geological Survey of WA
Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V.C. (2013) Gemstones of Western Australia - Mineral Resources Bulletin 25, Geological Survey of Western Australia (2013): p119
Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V.C. (2013) Gemstones of Western Australia - Mineral Resources Bulletin 25, Geological Survey of Western Australia (2013): p119
      • Nookawarra Station
Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V.C. (2013) Gemstones of Western Australia - Mineral Resources Bulletin 25, Geological Survey of Western Australia (2013) p277.
    • 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] Calderwood, M.A., Grguric, B.A., Jacobson, M.I., (2007). Guidebook to the Pegmatites of Western Australia. Hesperian Press, Carlisle, Western Australia.
Fetherston, J., Stocklmayer, S., Stocklmayer, V(2013): Gemstones of WA, Geological Survey of WA
      • Weelhamby Lake
Fetherston, J., Stocklmayer, S., Stocklmayer, V.(2013): Gemstones of WA, Geological Survey of WA
Simpson, E.S. (1931-1932) Journal of the Royal Society 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.
    • Port Hedland Shire
      • Mallina Station
Simpson, Edward S. (1952) Minerals of Western Australia Vol 3 (Facsimile ed. 1984). Hesperian Press, Carlisle, Western Australia p 684.
    • Upper Gascoyne Shire
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.
    • Wiluna Shire
      • Wiluna
        • Wiluna Mine
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p 324 (listed as Wiluna GM in Simpson)
    • Yalgoo Shire
      • Minjar Gold District
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p 305
      • Paynes Find
[var: Opal-AN] Pegamtites of Western Australia; M Jacobson, M Calderwood, B Grguric; Hesperian Press, Perth, 2007.
    • Yilgarn Shire
      • Bullfinch
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p320
Simpson, E.S. (1948), Minerals of Western Australia, Vol 1-p331, Vol 2- p218, p422, p540, Vol 3- p322, 1948
      • Parker Range Goldfield
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p 320
      • Southern Cross
The Southern Cross Times newspaper (1913), The Maori Lass, 11/06/1913
      • Yellowdine
Simpson, E.S. (1948), Minerals of Western Australia, Vol 3, p 322
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] Meixner, H. (1952): Neue Mineralfunde in den österreichischen Ostalpen XII. Carinthia II, 142./62, 27-46.; 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
    • Industrieviertel
      • Bad Deutsch-Altenburg
        • Pfaffenberg hill
Niedermayr, Gerhard & Seemann, Robert (1974): Vorläufiger Bericht über sedimentpetrographische Untersuchungen an Höhlensedimenten des Karstgebietes Pfaffenberg bei Bad Deutsch-Altenburg (Niederösterreich). - Die Höhle, 25, 3-11, Wien.
    • Mostviertel
      • Hafnerbach
        • Hengstberg
Kolitsch, U., Löffler, E., Schillhammer, H. & Knobloch, G. (2015): 1944) Allophan, Almandin, Apatit, Calcit, Diopsid, dravitischer Turmalin, Felsőbányait, Gips, Halotrichit, Jarosit(?), Klinozoisit, Melanterit, Mikroklin, Natrojarosit, Opal, Prehnit, Rutil, Sillimanit, Skapolith, Titanit, Tremolit, V-haltiger Muskovit(?) und Zirkon vom ehemaligen Graphitbergbau Hengstberg bei Hafnerbach im Mostviertel, Niederösterreich. Pp. 254-257 in Niedermayr, G. et al. (2015): Neue Mineralfunde aus Österreich LXIV. Carinthia II, 205./125., 207-280.
      • 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. (1986): 633. Diaspor, Harmotom, Korund und Prehnit aus dem Bereich von Wolfsbach, SE Drosendorf, Niederösterreich. Pp. 532-534 in 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)
      • Krumau am Kamp
        • Tiefenbach
RIEDEL, Christian (2008): Glanz und Schönheit - alte und neue Schmuckstein-Materialien aus dem Waldviertel.- In: STEININGER, Fritz F. (Hrsg.): Waldviertel - Kristallviertel. Die steinerne Schatzkammer Österreichs - Gesteine und Mineralien des Waldviertels, Schriftenr. Waldv. Heimatb., 49, 115-123, Horn.
      • Maissau
        • Limberg
Götzinger, M. A., Beran, A. & Libowitzky, E. (1994): Exkursion A: Mineralvorkommen und Lagerstätten im östlichen Waldviertel. Mitt. Österr. Mineral. Ges. 139, 389-405.
        • Oberdürnbach
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;
[var: Opal-AN] peter neschen collection
[var: Opal-AN] peter neschen collection; ;
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; Kolitsch, U., Schillhammer, H. & Lamatsch, P. (2015): 1936) Analcim, Axinit-(Fe), Chamosit, Datolith, Gips, Heulandit-Ca, Hyalit, Jarosit, Klinochlor, Klinoptilolith-Ca, Laumontit, Malachit, Molybdänit, Siderit, Sphalerit und Uraninit vom Steinbruch Hengl bei Eibenstein an der Thaya, Waldviertel, Niederösterreich. Pp. 243-245 in Niedermayr, G. et al. (2015): Neue Mineralfunde aus Österreich LXIV. Carinthia II, 205./125., 207-280.
[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)
Natural History Museum Vienna collection
      • 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)
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • St Oswald
GÖTZINGER, Michael A. (1987b): Vermiculitvorkommen der Böhmischen Masse in Österreich und ihre Entstehung.- Mitt. Österr. Miner. Ges., 132, 135-156, Wien.
peter neschen collection
    • Weinviertel
      • Ravelsbach
        • Parisdorf
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
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
        • St Oswald
Postl & Moser (1988)
      • 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
http://www.markasit070752.ws24.cc/text_62520295_60708465_19667850_deutsch.html
    • Oberhaag
      • Lieschengraben
[var: Opal-AN] peter neschen collection
    • Stubalpe
      • Hochgössnitz
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); Kolitsch, U. (2015): 1935) Almandin, Aragonit, Baryt, Heulandit-Na, Klinoptilolith-Na, ein Magnesiochromit-Spinell-Mischkristall und Schwefel vom Traunkraftwerk Pucking, Oberösterreich. Pp. 241-243 in Niedermayr, G. et al. (2015): Neue Mineralfunde aus Österreich LXIV. Carinthia II, 205./125., 207-280.
    • 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
Les minéraux de Belgique - Page 267 books.google.be/books?id=PncLAQAAIAAJ Joseph Mélon, ‎Pol Bourguignon, ‎André Mathieu Fransolet - 1976 - ‎Extraits -
  • Liège Province
    • Liège
Hatert, F., Deliens, M., Fransolet, A.-M. & van der Meersche, E. (2002): Les minéraux de Belgique. 2ème édition, Muséum des Sciences Naturelles, Bruxelles, Ed., 304 p.
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
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
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
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]
    • Guajeru
[var: Opal-AN] Mineralogical Record (1977) 8:382-387
Projeto Apatita - DNPM
      • Capim Grosso
        • Pedras Altas
Dutra, C. V., & Formoso, M. L. L. (2011). Considerações sobre os elementos terras raras em apatitas. Geochimica Brasiliensis, 9(2).
      • Gavião
- Projeto Apatita, DNPM
      • Ipirá
- Projeto Apatita, DNPM
- Projeto Apatita, DNPM
Martins da Pedra collection
    • Coromandel district
      • Bagagem River valley
Chaves, M. L. S. C., and Svisero, D. P., 1993, Características geológicas e origem conglomerados diamantíferos das regiões de Diamantina (Mesoproterozóico) e de Romaria (Cretáceo Superior), Minas Gerais: Boletim Instituto Geociências, Univ.São Paulo, Séries Cient., v. 24, p. 49-57.
    • 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
    • Itinga
      • Taquaral
        • Piauí valley
Chukanov N V et al (2007) Guimarãesite, a new Zn-dominant monoclinic roscherite-group mineral from Itinga, Minas Gerais, Brazil, New Data on Minerals. Moscow, 42, 11-15
  • 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
Revista Escola de Minas 68 (2015) 53-59.
    • 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.
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.
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.
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.
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.
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.
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.
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
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.
[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
www.gemstone.org/gem-by-gem/english/fire.html
    • Caxias do Sul
Fernando Brederodes Collection
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.
Revista Brasileira de Geociências 27:395-402
    • São Paulo
American Mineralogist 54:966-969; D Atencio & R Hypolito ()Fosfatos e silicatos secunderos de uranio de Perus, Sao Paulo
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
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
    • Momchilgrad Obshtina
Encheva, S., Petrov, P., Chukanov, N., Pekov, I., Енчева, С., Петко, П., ... & Пеков, И. Dachiardite-K from the area of Austa village, Momchilgrad municipality, Eastern Rhodopes–a new mineral species of zeolite group Дакиардит-K от района на с. Ауста, община Момчилград, Източни Родопи–нов минерален вид от групата на зеолитите.
    • 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
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
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
Canadian Mineralogist 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
        • York River area
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
    • 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.: Mineralogical Magazine 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
    • Tocopilla Province
      • Tocopilla District
samples analysed by Gerhard Mohn and Joy Desor
  • Atacama Region
    • Copiapó Province
      • Cachiyuyo de Llampos district
        • Carrera Pinto
samples analysed by Gerhard Mohn and Joy Desor
samples analysed by Gerhard Moehn
Sernageomin database 2005;Stgo de Chile
      • Tierra Amarilla
        • Las Pintadas district
          • Cerro Pintado
samples analysed by Gerhard Mohn and Joy Desor
        • Pampa Larga district
Samples analysed by Dr. Tony Kampf, Curator of LAC Mineralogical Museum, USA; Kampf, A. R., Mills, S. J., Housley, R. M., Rossman, G. R., Nash, B. P., Dini, M., & Jenkins, R. A. (2013). Joteite, Ca2CuAl [AsO4][AsO3 (OH)] 2 (OH) 2· 5H2O, a new arsenate with a sheet structure and unconnected acid arsenate groups. Mineralogical Magazine, 77(6), 2811-2823.; Kampf, A. R., Mills, S. J., Nash, B. P., Dini, M., & Molina Donoso, A. A. (2015). Tapiaite, Ca5Al2 (AsO4) 4 (OH) 4· 12H2O, a new mineral from the Jote mine, Tierra Amarilla, Chile. Mineralogical Magazine, 79(2), 345-354.
samples analysed by Gerhard Mohn and Joy Desor
      • Zapallar district
samples analysed by Jochen Schluter, Gerhard Mohn and Joy Desor
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.
  • Tarapacá Region
    • El Tamarugal Province
Darío Chinchilla, Lorena Ortega, Rubén Piña, Raúl Merinero, Daniel Moncada, Robert J. Bodnar, Cecilio Quesada, Antonio Valverde, Rosario Lunar (2016): The Patricia Zn–Pb–Ag epithermal ore deposit: An uncommon type of mineralization in northeastern Chile. Ore Geology Reviews 73, 104-126.
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.
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.
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.)
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.)
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
Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
Meixiang, Z., & Wei, T. (1987). Surface hydrothermal minerals and their distribution in the Tengchong geothermal area, China. Geothermics, 16(2), 181-195.
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
Daniel S Yunis
Costa Rica
 
  • Guanacaste Province
www.mineralmundi.com
www.mineralmundi.com
Cuba
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 (Čistá u Rovné; Město Litrbach; Lauterbach Stadt)
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 (Tabor)
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; Horschenz)
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)
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.
        • Nová Ves
Koníčková Š., Losos Z., Hrazdil V., Houzar S., Všianský D. (2016): Mineralogie „očkových“ opálů z Nové Vsi u Oslavan (moldanubikum, Český masív). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze 24, 1: 144-158.
      • 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.; Cerny, P., Hawthorne, F. C., Laflamme, J. H. G., & Hinthorne, J. (1979). Stibiobetafite, a new member of the pyrochlore group from Vezna, Czechoslovakia. Canadian Mineralogist, 17, 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
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); Pedersen, S. A. S. (2008). Palaeogene diatomite deposits in Denmark: geological investigations and applied aspects. Geological Survey of Denmark and Greenland Bulletin, 15, 21-24.
  • Nordjylland Region
    • Morsø
      • Mors Island
        • Ejerslev
Bøggild (1943); Bøggild (1943)
Torben Kjeldgård photo & specimen
Ecuador
Rocks&Min 51:11
  • Chimborazo Province
    • Alausi Canton
http://www.municipiodealausi.gob.ec/UserFiles/File/TIXAN.pdf
  • Guayas Province
    • Guayaquil Canton
      • Guayaquil
Ordoñez, Marta (2006): MICROPALEONTOLOGÍA ECUATORIANA. CIGG: PETROPRODUCCION. p : 85,86.
  • Zamora-Chinchipe Province
Hennessey, B.T., Puritch, E.J., Gowans, R.M., Leary, S.F., (2008) A mineral resource estimate for the Fruta Del Norte deposit, Cordillera del Condor Project, Zamora-Chinchipe Province, Ecuador; an NI 43-101 Technical Report prepared for Kinross Gold Corporation by Micon International Limited, 232p.
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)
    • Hawasa
Žáček V, Rapprich V, Šíma J, Škoda R, Laufek F, Legesa F (2015): Kogarkoite, Na3(SO4)F, from the Shalo hot spring, Main Ethiopian Rift: implications for F-enrichment of thermal groundwater related to alkaline silicic volcanic rocks. Journal of Geosciences, 60, 171-179.
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.
    • Luumäki
      • Kännätsalo
P. Koski sample
  • Southwestern Finland Region
    • Salo
      • Suomusjärvi
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
 
  • Auvergne-Rhône-Alpes
    • Allier
M Arliguie collection
    • Ardèche
      • Privas
Yves Masson specimens
        • Saint-Priest
Bull. Soc. Franç. Minéralo. Cristallo. , 1974, 97, pp. 450-464.
    • Cantal
      • Cantal Mts
        • Le Lioran
Yves Masson specimen
      • Menet
Vessely Yannick collection
      • Saint-Flour
        • Faverolles
[var: Opal-AN] Robin Fialip
        • Loubaresse
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
      • Yssingeaux
        • Araules
Périchaud, J.-J. (1986): Où trouver les minéraux d`Auvergne. II (Cantal-Haute-Loire). Éditions L`Instant Durable, 1986, 112p. (p.23)
    • 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
    • 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
Alain TUEL collection
      • Clermont-Ferrand
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
Remi Bornet Collection
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
Remi Bornet Collection
Remi Bornet Collection
Mallard, E., 1890, Bull. Soc. Min., v13, p. 63
Remi Bornet Collection
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
    • Rhône
      • Le Bois d'Oingt
        • Chessy-les-Mines
[Le Cahier des Micromonteurs 1988, 4, p.6-46]
  • 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
    • Ille-et-Vilaine
      • Fougères
John Brunet collection
      • Le Pertre
BRUNET, J. (2016) - Minéralogie du Massif du Pertre, Ille-et-Vilaine. Le Règne Minéral, 127, 5-18.
    • Morbihan
      • Pontivy
        • Guern
R. Pierrot, L. Chauris, C. Laforêt and F. Pillard : "Inventaire Minéralogique de la France N° 9 : Morbihan", BRGM, 1980.
  • Centre-Val de Loire
    • 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.
    • Indre-et-Loire
COCHER, C. (2015) - L'opale de la carrière de Paulmy, Indre-et-Loire. Le Règne Minéral, 126, pp. 51-52
  • Ile-de-France
    • Paris
  • Normandy
    • Manche
Yale Peabody Museum
  • Nouvelle-Aquitaine
    • 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
    • Deux-Sèvres
      • Le Temple
Le Cahier des micromonteurs, 2002, N°75, pp 8-25
    • Haute-Vienne
      • Razès
J. Geffroy, J.A. Sarcia, J. Chervet : "Les Minéraux Uranifères Français", 1960, Institut National des Sciences et Techniques Nucléaires / Saclay - PUF.
    • Lot-et-Garonne
Econ Geol (1989) 84:1541-1556
  • Occitanie
    • Aveyron
      • Firmi
    • Gard
      • Alzon
[var: Opal-AN] Patrice Queneau Collection
    • Haute-Garonne
      • Moncaup
Inventaire Minéralogique de la France numéro 8 Haute Garonne 31 Editions du BRGM 1978 page 115
TREILLARD Michel collection
collection bernard bouissac
collection bernard bouissac
      • 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.
    • Tarn
      • Castelnau-de-Brassac
        • Fumade
Jean-Marie LAURENT's collection
  • 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] MAURY (S), 2016 - Les indices minéralogiques de l'Estérel, 2ème partie. Le Cahier des Micromonteurs, n°132 (2-2016), pp 5-27
MAURY (S), 2015 - Les indices minéralogiques de l'Estérel, 1ère partie. Le Cahier des Micromonteurs, n°128 (2-2015), pp 17-33
      • Les Adrets
S. MAURY (S), 2015 - Les indices minéralogiques de l'Estérel, 1ère partie. Le Cahier des Micromonteurs, n°128 (2-2015), pp 17-33
    • Vaucluse
      • Apt
F. Roulin et al. , 1986, 109, pp. 349-357.
French West Indies
 
  • Guadeloupe
    • Basse-Terre
Olivier Mével spécimen
  • Martinique
    • Les Trois-Îlets
Robertson Collection
    • Saint-Pierre
Lacroix, A. (1910): Minéralogie de la France et de ses colonies, Librairie Polytechnique, Ch. Béranger Editeur, Tome IV, 900.
    • Sainte-Anne
Lacroix, A. (1910): Minéralogie de la France et de ses colonies, Librairie Polytechnique, Ch. Béranger Editeur, Tome III, 137-138.
Georgia
 
  • Adjaria Autonomous Republic
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
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
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
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
Frenzel, A. (1874): Mineralogisches Lexicon fpr das Königreich Sachsen, Leipzig.
        • Blauenthal
Tröger, S. (2009): Der Steinbruch Fahsel im Eibenstocker Granit, Westerzgebirge. Lapis 34 (6), 49-52.
        • Sosa
          • Auersberg
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
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)
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
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
  • Thessalia Department (Thessaly)
    • Larissa
M.G. Stamatakis, N.K. Koukouzas (2001) The occurrence of phosphate minerals in lacustrine clayey diatomite deposits, Thessaly, Central Greece. Sedimentary Geology 139:33-47.
  • 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
Rocks&Min 54:266
  • Gracias a Dios Department
Rob Lavinsky specimen
  • Lempira Department
Prüfer, P. (2002): Basalt-Opal aus Honduras. Lapis 27 (4): 35
N. Jb. Mineral. Abh. 186 (2009) 11-20.
Hungary
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] http://geomania.hu/lelohely.php?lelohely=200
[var: Opal-AN]
[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]
      • 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
      • Szerencs
[var: Opal-AN] Szakáll: Topographia Mineralogica Hungariae III.
      • Tállya
[var: Opal-AN]
      • Tarcal
[var: Opal-AN] http://www.geomania.hu/lelohely.php?lelohely=328
Topographia Mineralogica Hungariae II. Szakáll&Weiszburg
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
GEODA 2004
    • Mátra Mts
      • Gyöngyös
Mineral Species of Hungary, 2005
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
    • Cserhát Mts
      • Bercel
Szakáll & Jánosi: Minerals of Hungary, 1995
C. Lemanski, Jr. (re-entry of lost Mindat data).
[var: Opal-AN]
      • Nagylóc
Szakáll & Jánosi: Minerals of Hungary, 1995
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
  • Southern Region
    • 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
 
Sujatmiko, Dr H. C. Einfalt, Dr U. Henn (2007) Opal from Java, Indonesia and Its Varieties. http://www.hagi.or.id/paper/opal-from-java-indonesia-and-its-varieties/
    • Banten Province (Bantam Province)
Extra Lapis - English No. 10 Opal
  • Lesser Sunda Islands
    • Bali Province
[var: Opal-AN] Rod Martin personal collection
  • Sumatra (Sumatera)
    • Bengkulu Province (Benkoelen Province; Benkulen Province)
      • Rejang Lebong District (Rediang Lebong District)
Canadian Mineralogist Vol. 16, pp. 651-657 (1978)
  • Western New Guinea (Irian Jaya)
    • 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).
Israel
 
  • Negev
    • Gurim anticline
Sokol, E. V., Gaskova, O. L., Kozmenko, O. A., Kokh, S. N., Vapnik, E. A., Novikova, S. A., & Nigmatulina, E. N. (2014, November). Clastic dikes of the Hatrurim basin (western flank of the Dead Sea) as natural analogues of alkaline concretes: Mineralogy, solution chemistry, and durability. In Doklady Earth Sciences (Vol. 459, No. 1, pp. 1436-1441). Pleiades Publishing.
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)
Allan W. Eckert (1997) The World of Opals
www.mineralmundi.com; Tonsuaadu, K., Veiderma, M., Koel, M., & Nathan, Y. (2000). Thermal analysis of Israeli phosphorites. In PROCEEDINGS-ESTONIAN ACADEMY OF SCIENCES CHEMISTRY (Vol. 49, No. 1, pp. 44-52). TRUEKITUD OU.
Italy
 
  • Basilicata
    • Potenza Province
      • Monte Vulture
        • Melfi
"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
Russo M. (1984): La jarosite de "I Pisciarelli" (Napoli). Rivista Mineralogica Italiana, 8, 3 (3-1984), 109-110.
Pichler, H., (1970): Italienische Vulkangebiete II, Bornträger Berlin Stuttgart
  • Emilia-Romagna
    • Bologna Province
      • Reno Valley
        • Alto Reno Terme
          • Granaglione
Milani M., Calzolari M., Poli M. (2016): Ritrovamento di opale nella formazione del Macigno. Micro, 1/2016, 21-25.
    • 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
      • Làtera volcano
Di Domenico Dario
      • 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, M., Borgo, E., Palenzona, A. (1985): I nostri minerali. Geologia e mineralogia in Liguria. II Edizione. SAGEP Editrice, Genova, 296 pp.
  • 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
Boscardin M., De Michele V. and Scaini G. (1972): Itinerari mineralogici della Lombardia. Museo Civico di Storia Naturale, Milano 1972, pagg. 124.
          • Cuasso al Piano
Grill, E., Fagnani, G. (1943): Itinerari mineralogici. Comune di Cuasso al Monte. Natura, 34, 2, 63-69; Boscardin, M., De Michele, V., Scaini, G. (1970): Itinerari mineralogici della Lombardia. Natura, 61,1, 5-120; (as a monograph) 1972, Ed. Museo Civ. St. Nat. e Soc. It. Sci. Nat., Milano, 124 pp.
Grill, E., Fagnani, G. (1943): Itinerari mineralogici. Comune di Cuasso al Monte. Natura, 34, 2, 63-69; Boscardin, M., De Michele, V., Scaini, G. (1970): Itinerari mineralogici della Lombardia. Natura, 61,1, 5-120; (as a monograph) 1972, Ed. Museo Civ. St. Nat. e Soc. It. Sci. Nat., Milano, 124 pp.
[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
        • NE foot of Musinè Mt.
Jervis, G. (1873): I tesori sotterranei dell'Italia. Vol. 1: Regioni delle Alpi. Ed. Loescher, Torino, 410 pp.; Piolti, G. (1897): Sull'origine della magnesite di Caselette (Val di Susa). Mem. R. Acc. Sci. Torino, 2, 47, 126-142; Sanero, E. (1932): Sopra alcune rocce del M. Musinè (Valle di Susa). Per. Mineral., 3, 87-123; Fenoglio, M., Sanero, E., (1941): I giacimenti di magnesite delle Prealpi Piemontesi. Per. Mineral., 12, 83-111; Fenoglio, M., Sanero, E., (1942-43): Sulla presenza e diffusione della cristobalite-beta negli opali dei giacimenti di magnesite delle Prealpi Piemontesi. Atti R. Acc. Sci. Torino, 78, 265-273; Bortolami, G., Dal Piaz G.V. (1968): I filoni di gabbri rodingitici di Givoletto e Caselette nel Massiccio ultrabasico di Lanzo (Torino). Boll. Soc. Geol. It., 87, 479-490; Natale, P. (1972) : Nuove osservazioni sull’origine dei giacimenti di magnesite delle Alpi Occidentali. Boll. Ass. Min. Sub., 9, 1-2, 107-124; 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/Almese/Val della Torre
Jervis, G. (1873): I tesori sotterranei dell'Italia. Vol. 1: Regioni delle Alpi. Ed. Loescher, Torino, 410 pp.; Piolti, G. (1897): Sull'origine della magnesite di Caselette (Val di Susa). Mem. R. Acc. Sci. Torino, 2, 47, 126-142; Sanero, E. (1932): Sopra alcune rocce del M. Musinè (Valle di Susa). Per. Mineral., 3, 87-123; Fenoglio, M., Sanero, E., (1941): I giacimenti di magnesite delle Prealpi Piemontesi. Per. Mineral., 12, 83-111; Fenoglio, M., Sanero, E., (1942-43): Sulla presenza e diffusione della cristobalite-beta negli opali dei giacimenti di magnesite delle Prealpi Piemontesi. Atti R. Acc. Sci. Torino, 78, 265-273; Bortolami, G., Dal Piaz G.V. (1968): I filoni di gabbri rodingitici di Givoletto e Caselette nel Massiccio ultrabasico di Lanzo (Torino). Boll. Soc. Geol. It., 87, 479-490; Natale, P. (1972) : Nuove osservazioni sull’origine dei giacimenti di magnesite delle Alpi Occidentali. Boll. Ass. Min. Sub., 9, 1-2, 107-124; Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Amici del Museo "F. Eusebio" di Alba, Ed., Alba, 607 pp.
      • Casternone Valley
        • Givoletto