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Sepiolite

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Formula:
Mg4(Si6O15)(OH)2 · 6H2O
Colour:
White, light gray or light yellow.
Lustre:
Sub-Vitreous, Silky, Dull, Earthy
Hardness:
2
Specific Gravity:
2.0 - 2.2
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1847 by Ernst Friedrich Glocker from the Greek, "sepion," cuttle-fish bone, because of its low density and porous, bone like appearance. Originally named meerschaum by Abrahan Gottlieb Werner in 1788. Later translated as l'Ecume de mer. In 1794, the mineral was called keffekill by Richard Kirwan. Alexandre Brongniart called this mineral magnesite in 1807.
Isostructural with:
Commonly found as compact masses of microscopic needles resulting in a low-density masses. May be an important constituent of "mountain leather". Free-standing acicular crystals not found in many localities.

May be confused with palygorskite. Results of García-Romero & Suárez (2010) indicate that no compositional gap exists between sepiolite and palygorskite.


Hide all sections | Show all sections

Classification of SepioliteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.EE.25

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
74.3.1b.1

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
14.4.11

14 : Silicates not Containing Aluminum
4 : Silicates of Mg

Physical Properties of SepioliteHide

Sub-Vitreous, Silky, Dull, Earthy
Transparency:
Translucent, Opaque
Colour:
White, light gray or light yellow.
Streak:
White
Hardness:
Tenacity:
Brittle
Parting:
Good, but grain sizes are generally small and no cleavage may be seen.
Fracture:
Fibrous
Comment:
May be in parallel fibrous aggregates
Density:
2.0 - 2.2 g/cm3 (Measured)    2.25 g/cm3 (Calculated)
Comment:
May be very light due to porous aggregates

Optical Data of SepioliteHide

Type:
Biaxial (-)
RI values:
nα = 1.498 - 1.522 nβ = 1.507 - 1.553 nγ = 1.527 - 1.579
2V:
Measured: 20° to 70°, Calculated: 18°
Birefringence:
0.035
Max Birefringence:
δ = 0.029 - 0.057
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none
Optical Extinction:
Z=c; parallel
Pleochroism:
Non-pleochroic
Comments:
May appear nearly isotropic. Meerschaum from Turkey reported at 1.517

Chemical Properties of SepioliteHide

Formula:
Mg4(Si6O15)(OH)2 · 6H2O
IMA Formula:
Mg4Si6O15(OH)2 · 6H2O
Common Impurities:
Al,Ca,Fe,Ni

Crystallography of SepioliteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnna
Cell Parameters:
a = 5.21 Å, b = 26.73 Å, c = 13.5 Å
Ratio:
a:b:c = 0.195 : 1 : 0.505
Unit Cell V:
1,880.05 ų (Calculated from Unit Cell)
Morphology:
Needle-like fibers commonly in porous aggregates, also in fibrous sheets
Comment:
Pncn

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.8 (100)
4.53 (35)
4.29 (35)
3.77 (20)
3.35 (30vb)
2.58 (45)
2.26 (16b)
Comments:
See also ICDD 13-595

Type Occurrence of SepioliteHide

Synonyms of SepioliteHide

Other Language Names for SepioliteHide

Varieties of SepioliteHide

Aluminium-sepioliteAl rich Sepiolite
GunnbjarniteA ferroan variety of Sepiolite.
Originally reported from Greenland.

Relationship of Sepiolite to other SpeciesHide

Member of:
Other Members of this group:
Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
Ferrisepiolite(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m)
LoughliniteNa2Mg3Si6O16 · 8H2OOrth.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Jasper6 photos of Sepiolite associated with Jasper on mindat.org.
Dolomite5 photos of Sepiolite associated with Dolomite on mindat.org.
Quartz3 photos of Sepiolite associated with Quartz on mindat.org.
Demantoid3 photos of Sepiolite associated with Demantoid on mindat.org.
Amethyst3 photos of Sepiolite associated with Amethyst on mindat.org.
Quinzite Opal3 photos of Sepiolite associated with Quinzite Opal on mindat.org.
Calcite2 photos of Sepiolite associated with Calcite on mindat.org.
Anhydrite2 photos of Sepiolite associated with Anhydrite on mindat.org.
Mountain Leather1 photo of Sepiolite associated with Mountain Leather on mindat.org.
Fluorapatite1 photo of Sepiolite associated with Fluorapatite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EE.05BementiteMn7Si6O15(OH)8Mon.
9.EE.10BrokenhilliteMn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig.
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.15Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Mon.
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2OMon. 2/m : B2/m
9.EE.20TuperssuatsiaiteNa2Fe3Si8O20(OH)2 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn5Si8O20(OH)2 · 8-9H2OMon. 2/m : B2/m
9.EE.20WindhoekiteCa2Fe3+2.67[Si8O20](OH)4 · 10H2O Mon. 2/m : B2/m
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth.
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric.
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric.
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig.
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.40NatrosiliteNa2Si2O5Mon.
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth.
9.EE.55RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 2 2 2 : C2 2 2
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2OTrig.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
9.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.
9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2OTric. 1 : P1
9.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4H2OTric. 1 : P1
9.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

74.3.1b.2Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
74.3.1b.3LoughliniteNa2Mg3Si6O16 · 8H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.4.1ForsteriteMg2SiO4Orth. mmm (2/m 2/m 2/m)
14.4.2EnstatiteMgSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
14.4.3ClinoenstatiteMgSiO3Mon.
14.4.4ChrysotileMg3(Si2O5)(OH)4Mon.
14.4.5ClinochrysotileMon. 2/m
14.4.6OrthochrysotileOrth.
14.4.7ParachrysotileOrth.
14.4.8LizarditeMg3(Si2O5)(OH)4
14.4.9TalcMg3Si4O10(OH)2Tric. 1 : P1
14.4.10SpadaiteMgSiO2(OH)2 · H2O (?)
14.4.12LoughliniteNa2Mg3Si6O16 · 8H2OOrth.
14.4.13EifeliteKNa3Mg4Si12O30Hex.
14.4.14Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2Mon.
14.4.15AntigoriteMg3(Si2O5)(OH)4Mon. m : Bm
14.4.16 Magnesio-anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for SepioliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Glocker, E.F. (1847) Ordo XIII. Argillitae. II. Argillitae pingues. 15. Sepiolithus. in: Generum et specierum mineralium secundum ordines naturales digestorium synopsis. Apud Eduardum Anton, Halle: 185-195.
Brauner, K., Preisinger, A. (1956) Struktur und Entstehung des Sepioliths. Tschermaks Mineralogische und Petrographische Mitteilungen: 6: 120-140. [in German]
Brindley, G.W. (1959) X-ray and electron diffraction data for sepiolite. Amer. Mineral., 44, 495-500.
Van Olphen, H. (1966) Maya Blue: A clay-organic pigment? Science: 154: 3749: 645–646.
Nagata, H., Shimoda, S., Sudo, T. (1974) On dehydration of bound water of sepiolite. Clays and Clay Minerals: 22: 285-293.
Rautureau, M., Tchoubar, C. (1976) Structural analysis of sepiolite by selected area electron diffraction—relations with physico-chemical properties. Clays and Clay Minerals: 24: 43.
Guven, N., Carney, L.L. (1979) The hydrothermal transformation of sepiolite to stevensite and the effect of added chlorides and hydroxides. Clays and Clay Minerals: 27: 253-260.
Post, J.E., Bish, D.L., Heaney, P.J. (2007) Synchrotron powder X-ray diffraction study of the structure and dehydration behavior of sepiolite. American Mineralogist: 92: 91-97.
García-Romero, E., Suárez, M. (2010) On the chemical composition of sepiolite and palygorskite. Clays and Clay Minerals: 58: 1-20.
Giustetto, R., Levy, D., Wahyudi, O., Ricchiardi, G., Vitillo, J.G. (2011) Crystal structure refinement of sepiolite/indigo Maya Blue pigment using molecular modelling and synchrotron diffraction. European Journal of Mineralogy: 23: 449-466.
Sánchez, M., García-Romero, E., Suárez, M., Silva, I., Fuentes-Montero, L., Martínez-Criado, G. (2011) Variability in sepiolite: Diffraction studies. American Mineralogist: 96: 1443-1454.

Internet Links for SepioliteHide

Localities for SepioliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina
 
  • Río Negro
    • Valcheta department
      • Aguada Cecilio
Hayase, K., Manera, T. & Maiza, P.J. (1970): Sepiolite found in a calcareous rock deposit of the Cantera Cecchi Mine, Rio Negro Province, Argentina. The Journal of the Japanese Association of Mineralogists. 63 (3), 95-108
Australia
 
  • New South Wales
    • Wentworth Co.
      • Wentworth
        • 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.
  • Queensland
No reference listed
    • Mount Isa City Shire
      • Mount Isa
Sielecki, R. (1988) The Mount Isa-Cloncurry mineral field. Mineralogical Record, Vol. 19, pg. 469-490.
Updated list originally distributed by University of Queensland
part of list University of Queensland
  • South Australia
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
www.crocoite.com (Steve Sorrell) and refs therein
  • Tasmania
    • King Island municipality
      • King Island
        • Grassy
  • Western Australia
    • Leonora Shire
      • Linden Goldfield
Graham, J.L. (2003), Red October Gold Deposit, CRC LEME, 2003
    • Wiluna Shire
      • Mount Keith
Grguric, B.A. (2003) Minerals of the MKD5 nickel deposit, Mount Keith, Western Australia. Australian Journal of Mineralogy, Vol. 9, No.2 pp.55-71.
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    • Gurktaler Alpen
      • Radenthein
        • Millstätter Alpe
Pichler (2009)
  • Lower Austria
    • Mostviertel
      • Dunkelstein Forest
        • Dunkelsteinerwald
          • Gansbach
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Waldviertel
      • Brunn an der Wild
        • St Marein
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993); Helmut Pristacz PXRD analysis 8/09
      • Dobersberg
Huber, S., Huber, P. (1977): Mineralfundstellen. Band 8: Oberösterreich, Niederösterreich und Burgenland. - 271 p., München - Innsbruck (Christian Weise, Pinguin).
      • Lichtenau im Waldviertel
Pristacz, H., Kolitsch, U., Löffler, E. & Knobloch, G. (2009): 1594) Dravit und Sepiolith aus dem Steinbruch Malaschofsky bei Lichtenau, WSW Gföhl, Waldviertel, Niederösterreich. P. 214 in: Niedermayr, G. et al. (2009): Neue Mineralfunde aus Österreich LVIII. Carinthia II, 199/119, 189-236.
      • Pölla
        • Altpölla
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • Straß im Straßertale
SIGMUND, Alois (1937a): Die Minerale Niederösterreichs.- 2. Aufl., XI + 247 S., Wien - Leipzig (Deuticke).
  • Salzburg
    • Hohe Tauern
      • Stubach valley
Strasser, A. (1989): Die Minerale Salzburgs. Salzburg. 346p
  • Styria
    • Bruck an der Mur
      • Laming valley
        • Oberdorf an der Laming
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Fischbacher Alpen
      • St. Jakob-Breitenau
        • Hochlantsch
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Graz
      • Wildon
        • Weitendorf
peter neschen collection
    • Knittelfeld
      • St Lorenzen bei Knittelfeld
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Leoben
      • Galgenberg
Annalen 1999, p.11-22
      • Kraubath an der Mur
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Neuberg an der Mürz
      • Arzbach (Arzbachleiten)
Hackenberg 2003
    • Niedere Tauern
      • Hohentauern
        • Sunk
MEIXNER, H. (1963): Neue Mineralfunde in den österreichischen Ostalpen XVIII. Carinthia II, 153./73., 124-135.; Aufschluss 1972(SB), 21-26
  • Upper Austria
    • Steyr-Land
peter neschen collection
Brazil
 
  • Amazonas
    • Presidente Figueiredo
      • Pitinga mine
A. C. Bastos Neto, V. P. Pereira, L. H. Ronchi, E. F. de Lima and J. C. Frantz (2009): The world-class Sn, Nb, Ta, F (Y, REE, Li) deposit and the massive cryolite associated with the albite-enriched facies of the Madeira A-type granite, Pitinga mining district, Amazonas State, Brazil. Canadian Mineralogist 47, 1329-1357.
  • Goiás
    • Barro Alto
Ratié, G., Jouvin, D., Garnier, J., Rouxel, O., Miska, S., Guimarães, E., ... & Thil, F. (2015). Nickel isotope fractionation during tropical weathering of ultramafic rocks. Chemical Geology, 402, 68-76
Canada
 
  • Manitoba
    • Bird River area
C. J. A. Coats and R. Buchan (1979) Petrology of serpentinized metamorphic olivine, Bird River Sill, Manitoba Can Mineral, 17:847-855
  • Ontario
    • Haliburton Co.
      • Cardiff Township
Sabina, A. P. (1982): Some rare minerals of the Bancroft area. Mineralogical Record 13, 223-228
      • Monmouth Township
geological survey of canada misc report 39; geological survey of canada economic geology report 29
    • Sudbury District
      • Levack Township
Springer (1989) Canadian Mineralogist 27, 311-313
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
China
 
  • Anhui Province
    • Chuzhou Prefecture
      • Quanjiao Co.
Wenguang Li (1997): Jilin Geology 16(4), 22-25; Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
  • Henan Province
    • Nanyang Prefecture
Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
    • Sanmenxia Prefecture
Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
  • Hunan Province
    • Changsha Prefecture
Yongzhang Zhou, Shuanbin Wang, and Jiakuan Bao (1993): Geology and Prospecting 29(12), 24-28
        • Yonghe
Wenguang Li (1997): Jilin Geology 16(4), 22-25; Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
  • Jiangsu Province
    • Huai'an Prefecture
      • Xuyi Co.
Wenguang Li (1997): Jilin Geology 16(4), 22-25; Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
  • Jiangxi Province
    • Jingdezhen Prefecture
      • Leping Co.
Sakamoto, S., Ando, T., and Otsuka, R. (1988): Nendo Kagaku 28(3), 134-142; Wenguang Li (1997): Jilin Geology 16(4), 22-25
  • Qinghai Province
    • Haixi Autonomous Prefecture
      • Mangnai Co. (Mangya Co.)
Chang Xu (1985): Scientia Geologica Sinica 1(1), 87-96
  • Shaanxi Province
    • Hanzhong Prefecture
      • Ningqiang Co.
Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
  • Sichuan Province
    • Ya'an Prefecture
      • Shimian Co.
Industrial Minerals and Processing 33(12), 8-11 (2003).
  • Tibet Autonomous Region
    • Ngari Prefecture
      • Gê'gyai Co. (Geji Co.)
Chang Xu (1985): Scientia Geologica Sinica 1(1), 87-96
  • Yunnan Province
    • Chuxiong Autonomous Prefecture
Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
    • Wenshan Autonomous Prefecture
      • Malipo Co.
Kaiji Yu (1981): Geology and Prospecting 17(1), 19-25 (in Chinese).
  • Zhejiang Province
    • Hangzhou Prefecture
Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
Colombia
 
  • Córdoba Department
    • Mun. de Montelíbano
Econ Geol (2004) 99:1197-1213; Lopez-Rendon, J. E. (2015). Geology, mineralogy and geochemistry of the Cerro Matoso nickeliferous laterite, Córdoba, Colombia (Doctoral dissertation, Colorado State University. Libraries).
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Kutná Hora (Kuttenberg)
Pauliš P. Mineralogické lokality okolí Kutné Hory. Kuttna 1999, Kutná Hora. p. 14-16.
      • Zruč nad Sázavou (Srutsch an der Sasau)
Pauliš, P.: Sametka z Vlastějovic u Zruče nad Sázavou. Minerál, 2002, roč. 10, č. 1, s. 7 – 8.
    • South Bohemia Region
      • Frymburk
        • Černá v Pošumaví (Schwarzbach im Böhmerwald)
Zikeš J., Welser P.: Nové nálezy minerálů v lomu Vápenný vrch. Minerál, 2011, 19, 1, 9-11.
  • Moravia (Mähren; Maehren)
    • South Moravia Region
      • 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.
      • Oslavany
        • 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.
    • Vysočina Region
      • Bystřice nad Pernštejnem
Pelíšek, J.: Nové minerály ze serpentinitu od Věchnova u Bystřice nad Pernštejnem. Časopis pro mineralogii a geologii, 1988, roč. 33, č. 2, s. 204.
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.
      • Žďár nad Sázavou
Helmut Pristacz jr. PXRD analysis 8/09 (specimen in doubles collection in NHM Vienna)
Dominican Republic
 
  • Monseñor Nouel Province
    • Bonao
Proenza, J. A., Zaccarini, F., Lewis, J. F., Longo, F., & Garuti, G. (2007). Chromian spinel composition and the platinum-group minerals of the PGE-rich Loma Peguera chromitites, Loma Caribe peridotite, Dominican Republic. The Canadian Mineralogist, 45(3), 631-648.
France
 
  • Auvergne-Rhône-Alpes
    • Haute-Loire
      • Brioude
        • Vieille-Brioude
    • Rhône
      • Tarare
        • Le Breuil
G. Demarcq, 1973, "Guides Géologiques Régionaux : Lyonnais, Vallée du Rhône" , p. 49, Masson.
  • 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.
  • Grand Est
    • Marne
      • Champigny
"Les minéraux, leurs gisements, leurs associations", P. Bariand, F. Cesbron et J. Geffroy (1977), Editions Minéraux et Fossiles, BRGM
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
"Les minéralisations associées au volcanisme andésitique de Biot-Villeneuve Loubet (Alpes Maritimes)" P. ROSTAN ,2005
Germany
 
  • Baden-Württemberg
Weisenberger, Tobias B. & Spürgin, Simon (2014) Hydrothermal phonolite alteration in the Kaiserstuhl Volcanic Complex, Germany. 31st Nordic Geological Meeting, Lund Sweden.
      • Bötzingen
Weisenberger, T.B., Spürgin, S., Lahaye, Y. (2014): Hydrothermal alteration and zeolitization oft he Fohberg phonolite, Kaiserstuhl Volcanic Complex, Germany, International Journal of Earth Sciences, Vol. 103 (8). 2273-2300
  • Bavaria
    • Franconia
      • Münchberg Metamorphic complex
        • Kupferberg
F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984
        • Oberkotzau
          • Wurlitz
F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984; Rost, F. (1949): Contributions to Mineralogy and Petrology 1(5/6), 627-688.
        • Zell
F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984
  • Rhineland-Palatinate
    • Eifel
      • Gerolstein
        • Roth
Blaß, G. & Schüller, W. (2012): Der Rother Kopf in der Vulkaneifel. Lapis, 37 (3), 20-29.
  • Saxony
    • Erzgebirge
Lapis 30(7/8):78-80 (2005)
Greece
 
  • Aegean Islands Department (Aiyaíon)
    • Kykládes Prefecture
      • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
Gauthier, G. & Albandakis, N. (1991): Minerals of the Seriphos Skarn, Greece. Mineralogical Record 22(4) 303-308
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
Gunnar Farber specimens
Greenland
 
  • Kujalleq
    • Narsaq
Semenov, E. (2001): Notes on Ephesite, Terskite, Na-Komarovite, Ceriopyrochlore-(Ce), Joaquinite-(Ce) and other minerals from the Ilimaussaq alkaline complex, South Greenland, Geology of Greenland Survey Bulletin 190, 123-125; Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
  • Northeast Greenland National Park
[var: Gunnbjarnite] American Mineralogist 37:1070-1071
Hungary
 
  • Pest Co.
    • Börzsöny Mts
      • Nagybörzsöny (Deutsch Pilsen; Deutschpilsen)
Szakáll & Jánosi: Minerals of Hungary, 1995
  • Veszprém Co.
    • Bakony Mts
      • Úrkút
        • Csárda Hill
Szakáll & Jánosi (1996) The Minerals of Hungary
Indonesia
 
  • Sulawesi (Celebes)
    • Sulawesi Selatan Province (South Sulawesi Province)
      • Soroako
Sufriadin, S. (2012). Thermal and Infrared Studies of Garnierite from the Soroako Nickeliferous Laterite Deposit, Sulawesi, Indonesia. Indonesian Journal of Geology, 7(2).
Israel
 
  • Negev
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
Italy
 
  • Lombardy
    • Sondrio Province
      • Valtellina
        • Malenco Valley
          • Lanterna Valley
            • Lanzada
              • Campo Franscia (Franscia)
Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
          • Torre di Santa Maria
            • Torreggio Valley
              • Airale Valley
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.
  • Piedmont
    • Torino Province
      • Canavese District
        • Baldissero Canavese
Glocker, E.F. (1847): Generum et specierum mineralium secundum ordines naturales digestorium synopsis. Halle, 348 pp.;
        • Léssolo
          • Cálea
http://www.webmineralshop.com/articoli/brosso_eng.htm
      • Germanasca valley
        • Prali
Ciriotti, M.E. & Biagioni, C. (2011): Pot-pourri 2011: identificazioni di minerali di interesse. Micro, 3/2011, 125-133
G.C. Piccoli, G. Maletto, P. Bosio, B. Lombardo. I minerali del Piemonte e della Vall d'Aosta. Ass. Amici del museo "F. Eusebio", Alba, 2007.
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.
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Bolzano Province (South Tyrol)
      • Passiria Valley (Passeier Valley)
Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
  • Tuscany
    • Pisa Province
      • Pomarance
Orlandi P., (2005). "Geositi minerari e mineralogici della provincia di Pisa" in La geologia della provincia di Pisa. Cartografia, geositi e banche dati, pp. 55-280, Provincia di Pisa, 2005
  • Veneto
    • Vicenza Province
      • Astico Valley
        • Cogollo del Cengio
- Zordan A., Boscardin M. "Aggiornamenti nel Vicentino" - Studi e Ricerche - Associazione Amici del Museo , Museo Civico "G.Zannato" Montecchio Maggiore (Vicenza) vol. 13 (2006),pp.35-40
      • Brendola
Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
      • Cornedo Vicentino
        • Spagnago
Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183; - Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
Japan
 
  • Hokkaido
Dr. Yohachiro Okamoto collection (conserved by the Geological Survey of Japan)
  • Honshu Island
    • Chubu Region
Yongzhang Zhou, Shuanbin Wang, and Jiakuan Bao (1993): Geology and Prospecting 29(12), 24-28
    • Kanto Region
      • Saitama Prefecture
        • Hannou
Kato, A. (2010) Mumeikai Group meeting, No. 30.
    • Kinki Region
      • Kyoto Prefecture
        • Yoza-gun
          • Yosa-mura
IMAI, N., & OTSUKA, R. (2000). Department of Mineral Industry, School of Science and Engineering, Waseda University, Tokyo, 160 Japan. Palygorskite-Sepiolite: Occurrences, Genesis and Uses, 37, 211.
    • Tohoku Region
      • Fukushima Prefecture
        • Iwaki City
Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan)
      • Iwate Prefecture
        • Kamaishi City
Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
        • Kunohe-gun
          • Hirono-cho
            • Ono
Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
      • Miyagi Prefecture
        • Kurihara
Imai, H. (1978) Geological studies of the mineral deposits in Japan and East Asia. p67 (University of Tokyo Press)
  • Kyushu Region
    • Fukuoka prefecture
Masutomi Museum specimen (Kyoto); 上原誠一郎. (1987). Serpentine minerals from Sasaguri area, Fukuoka Prefecture, Japan. 岩石鉱物鉱床学会誌, 82(3), 106-118.
Kenya
 
  • Rift Valley Province
Hay RL, Hughes RE, Kyser TK, Glass HD and Liu JH (1995) Clays and Clay Minerals, vol. 43, p.455-466; Stoessell and Hay (1978) Contributions to Mineralogy and Petrology, vol. 65, p.255-267.
Madagascar
 
  • Tuléar Province (Toliara)
    • Androy Region
      • Bekily District
        • Beraketa Commune
Lacroix, A. (1941): Les gisements de phlogopite de Madagascar et les pyroxenites qui les renferment. Texte (Extrait du fasicule XI des Annuales Géologiques du Service des Mines). Tananarive. p.95
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Gélogique Madagascar. A 1871
Malaysia
 
  • Perak
    • Kinta District
      • Kramat Pulai
Mexico
 
  • Coahuila
    • Mun. de Cuatrociénegas
      • Cuatro Ciénegas (Cuatrociénegas de Carranza; Venustiano Carranza)
        • Limestone caves
Forti, P. et al. (2006): ACTA CARSOLOGICA 35/1, 79–98.
  • Durango
    • Mun. de Durango
      • Cerro de los Remedios
        • Victoria de Durango
No reference listed
  • Zacatecas
    • Mun. de Concepción del Oro
      • Bonanza
Panczner (1987): 338.
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
S. Weiß: Lapis 31(7/8), 72-73 (2006)
New Caledonia
 
  • Northern Province
    • Kouaoua Commune
Manceau, A., Calas, G., & Decarreau, A. (1985). Nickel-bearing clay minerals: I. Optical spectroscopic study of nickel crystal chemistry. Clay Minerals, 20(3), 367-387.
New Zealand
 
  • South Island
    • Nelson
Cox, H. S. (1882). Notes on the mineralogy of New Zealand. New Zealand Institute.
Norway
 
  • Akershus
    • Nittedal
Berg, H.-J. & Ødegård, E. (2003): Mineralene i Bjønndalen Bruk. Bergverksmuseets Skrift 25, 23-28
  • Aust-Agder
    • Risør
      • Akland
Garmo, T. (2003). Mineralnotat 2002. STEIN 30 (1), 14-16
  • Buskerud
    • Kongsberg
Van der Wel, D. (1972): Contribution to the Mineralogy of Norway No. 51. Asbestos minerals from Kongsberg silver deposit. Norsk Geologisk Tidsskrift 52: 287-294; Johnsen, O. (1986): Famous mineral localities: The Kongsberg silver Mines Norway. Mineralogical Record, 17: 19-35
    • Øvre Eiker
      • Gunhildrud
Jahren, J.; Berg, H.J.; Hurum, J.H. & Wulff-Pedersen, E. (1998): Nye undersøkelser av amazonitt-genthelvin pegmatitten fra Fiskum, Øvre Eiker. Bergverksmuseets Skrift 14, 13-16
  • Nordland
Nordrum, F.S. (2010): Nyfunn av mineraler i Norge 2009-2010. Stein 37 (2), 4-14
  • Oppland
    • Valdres
      • Vang
"Sigurd Stordal" Collection; Bergen Museum, Norway collection
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Gogołów-Jordanów Massif
JANECZEK J., KOZŁOWSKI K., ŻABA J. 1991. ZBIERAMY MINERAŁY I SKAŁY.
    • Rudawy Janowickie Mts
      • Czarnów
        • Rędziny
Domańska, J.: Rędziny. Otoczak, nr. 29, p. 38-52.
  • Małopolskie
    • Chrzanów District
      • Alwernia commune
Eligiusz Szełęg private collection
    • Kraków District
      • Krzeszowice Community
        • Dębnik-Dubie area
Lewandowska A., Rospondek M. 2002: Thaumasite - a rare mineral containing Si(OH)6 2- groups from Dubie (the Dębnik anticline, S Poland). Mineralogia Polonica, vol. 33, no 1, 25-34
Eligiusz Szełęg collection
Republic of Macedonia
 
  • Struga
    • Ržanovo
Todor Serafimovski, Blažo Boev, Goran Tasev (2012): SOME QUANTITATIVE ASPECTS OF THE MAJOR TYPES OF ORES AT THE RŽANOVO FE-NI LATERITIC DEPOSIT, R. MACEDONIA. Geologica Macedonica, 26, 21–35.
Romania
 
  • Caraş-Severin Co.
    • Banat Mts
      • Moldova Nouă-Sasca Cu-Mo ore field
www.minerals-of-the-carpathians,2009
Russia
 
  • Central Region
    • Moscow Oblast' (Moskovskaya Oblast')
Pekin, A. (2011) Minerals of Moscow. Russian Journal of General Chemistry. Jun2011, Vol. 81 Issue 6, p1381-1391.
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Zheleznogorsk (Korshunikha)
Mazurov, M.P., Grishina, S.N., Istomin, V.E., and Titov, A.T. (2007): Geology of Ore Deposits 49(4), 271-284.; Mazurov et al (2007) Geology of Ore Deposits, 49, 271–284.
    • Sakha Republic (Saha Republic; Yakutia)
[World of Stones 12:49]
  • Far-Eastern Region
    • Primorskiy Kray
      • Kavalerovo Mining District
        • Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche)
Min Rec vol 32, pp 7-30 (2001)
  • Northern Region
    • Murmanskaya Oblast'
www.koeln.netsurf.de/~w.steffens/lovo.htm
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
        • Magnitogorsk
          • Sakhara District (Sakharinskii)
            • Sakhara massif
Talovina, I.V., Lazarenkov, V.G., Ryzhkova, S.O., Ugol'kov, V.L., and Vorontsova, N.I. (2008): Lithology and Mineral Resources 43(6), 588-595.
        • Ufaley District (Ufalei District)
Talovina, I.V., Lazarenkov, V.G., Ryzhkova, S.O., Ugol'kov, V.L., and Vorontsova, N.I. (2008): Lithology and Mineral Resources 43(6), 588-595.; Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
Talovina, I.V., Lazarenkov, V.G., Ryzhkova, S.O., Ugol'kov, V.L., and Vorontsova, N.I. (2008): Lithology and Mineral Resources 43(6), 588-595.
      • Orenburgskaya Oblast'
        • Svetlyi
          • Buruktal District
            • Buruktal massif
Talovina, I.V., Lazarenkov, V.G., and Vorontsova, N.I. (2003): Lithology and Mineral Resources 38(5), 403-415.
Slovakia
 
  • Banská Bystrica Region
    • Rimavská Sobota Co.
      • Hnúšťa
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
  • Prešov Region
    • Vranov nad Topľou Co.
Ďuďa,R., et al., 1981: Mineralógia severnej časti Slanských vrchov. Min.Slovaca, Monografia 2, 98s
Slovenia
 
  • Pohorje Mts (Pohorje Massif)
    • Oplotnica (Oplotnitz)
      • Cezlak
Postl, W., Bojar, H.-P. & Žorž, Z. (2015): Calcioankylit-(Ce) und Sepiolith aus dem "Tonalit"-Steinbruch in Cezlak bei Oplotnica, Pohorje-Gebirge, Slowenien. Der Steirische Mineralog 30, 42.
Somalia
 
  • Galguduud Region
    • El Buur
www.mineralmundi.com
South Korea
 
old "Chuseihokudo" specimen on sale at Tokyo show, december 2011
Spain
 
  • Aragón
    • Teruel
      • Azaila
Calvo, M. (2008). Minerales de Aragón. Prames, Zaragoza. 463 pags.
    • Zaragoza
      • Orera
- Calvo, M. (2008). Minerales de Aragón. Prames, Zaragoza, 463 pags.
      • Ruesca
- Calvo, M. (2008). Minerales de Aragón. Prames, Zaragoza, 463 pags.
  • Asturias
    • Salas
      • Carlés
Calvo, M. & Viñalas, J. (2014). Mineralogy of the gold deposit in Carlés, Salas, Asturias, Spain. Mineral Up, 3 (6), 6-32
  • Castile-La Mancha
    • Toledo
Yongzhang Zhou, Shuanbin Wang, and Jiakuan Bao (1993): Geology and Prospecting 29(12), 24-28
  • Castile and Leon
    • Palencia
Stvdia Geologica Salmanticensia, 26: 7-25
  • Madrid
    • Madrid
      • Vallecas
Ruishi Yang and Wenguang Li (2001): Geology of Chemical Minerals 23(1), 25-30
      • Vicálvaro
http://www.foro-minerales.com/forum/viewtopic.php?p=123315#123315
Sweden
 
  • Värmland
    • Filipstad
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183. ; K:Gatedal
      • Nordmark district
No reference listed
Switzerland
 
  • Ticino (Tessin)
    • Leventina
      • Bedretto Valley
        • Ronco
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 367.
Tanzania
 
  • Kilimanjaro Region
Sampson, D. N. (1966): Sinya meerschaum mine, northern Tanzania. Transactions of the Institution of Mining and Metallurgy, Section B: Applied Earth Science 75, 23-34.
Turkey
 
  • Central Anatolia Region
    • Eskişehir Province
      • Mihaliççik
Echle, W. (1967): Contributions to Mineralogy and Petrology 14, 86-101.
    • Konya Province
      • Great Konya Basin
Karakaya, N., Karakaya, M. Ç., Temel, A., Küpeli, Ş., & Tunoğlu, C. (2004). Mineralogical and chemical characterization of sepiolite occurrences at Karapinar (Konya Basin, Turkey). Clays and Clay Minerals, 52(4), 495-509.
    • Niğde Province
Altay, T., Karakaya, M.Ç., and Murat, A. (2010): Goldschmidt Conference Abstracts 2010.
UK
 
  • England
    • Cornwall
      • Lizard Peninsula
        • Grade-Ruan
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
            • Kennack Cove (Kennack Sands)
Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
    • Somerset
      • Cranmore
Turner, R.W. and Rumsey, M.S. (2010): Mineral Relationships in the Mendip Hills. Journal of the Russell Society, vol 13, pp 3-46.
    • Worcestershire
      • Malvern Hills
BMS Database
  • Scotland
    • Shetland Islands
      • Unst
Livingstone, 2002, p. 182
USA
 
  • Alaska
    • Valdez-Cordova Borough
      • Chisana District
U. S. Geological Survey Open-File Report 02-195
  • Arizona
    • Cochise Co.
      • Mule Mts
        • Warren District
Graeme, R. (1981), Famous mineral localities: Bisbee, Arizona, Mineralogical Record: 12: 256-319.
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Christmas area
            • Christmas
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 358.
    • Greenlee Co.
      • Shannon Mts
        • Copper Mountain District (Clifton-Morenci District)
          • Clifton
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 366.
    • La Paz Co.
      • Little Harquahala Mts
        • Little Harquahala District
Anne Seminaris specimen; John Attard PXRD.
    • Pima Co.
      • Sierrita Mts
        • Pima District (Olive District; Mineral Hill District; Twin Buttes District)
          • San Xavier
            • Mission complex
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 366.
AmMin 27:512
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 366; Kauffman, Jr., A.J. (1943), Fibrous sepiolite from Yavapai Co., AZ, Am.Min.: 28: 512-520; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 107.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 366.
  • California
    • Fresno Co.
Gunnar Farber
    • Inyo Co.
      • Death Valley
Econ Geol (1996) 91:622-635
Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp. (includes catalog of minerals of California pp. 63-410), and miscellaneous observations on mineral products): 353; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 334.
      • Panamint Mts (Panamint Range)
        • Panamint District (Ballarat District)
          • Ballarat
Post, J. L. (1984) Saponitye from near Ballarat, California. Clays and Clay Minerals, Vol. 32, No. 2, 147-153.
Hardie, L.A. (1968) The origin of the Recent nonmarine evaporate deposit of Saline Valley, Inyo County, California. Geochimica et Cosmochimica Acta: 32: 1287; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 441.
    • Los Angeles Co.
Fleischer, P. (1972) Sepiolite associated with Miocene diatomite, Santa Cruz basin, California. American Mineralogist: 57: 903-913; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 441.
    • Riverside Co.
      • Crestmore
        • Crestmore quarries
          • Sky Blue Hill
Daly, John W. (1935), Paragenesis of mineral assemblages at Crestmore, California American Mineralogist: 20: 638-659; Woodford, A.O., Crippen, R.A., and Garner, K.B. (1941) Section Across Commercial Quarry, Crestmore, California. American Mineralogist: 26: 367; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 441.
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • Picacho Peak
Mineralogical Record: 36(4): 337-363.
    • San Bernardino Co.
      • Bristol Mts
        • Amboy area
; Otton, James K.; Glanzman, Richard K.; Brenner-Tourtelot, Elizabeth F. (1980) Uranium, rare-earth and thorium mineralization at the Hope Mine, eastern Bristol Mountains, San Bernardino County, California. USGS Open file report 80-821.
      • Calico Mts (Calico Hills)
        • Calico District (Daggett District; Calico-Daggett area)
          • Calico
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
      • Kingston Range
        • Kingston Range District
          • Kingston Peak
Hewett, Donnel Foster (1956) Geology and mineral resources of the Ivanpah quadrangle, California and Nevada, USGS Professional Paper 275, 172 pp.: 144; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 441.
      • Silver Lake District
        • Soda Mts
          • Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort)
XRD confirmed by Tony Kampf.; American Mineralogist, Volume 94, pages 1198–1204, 2009
    • Santa Cruz Co.
      • Santa Cruz
Mineralogical Record: 17:315
      • Santa Cruz Mts
        • Ben Lomond Mountain
          • Ben Lomond Mountain area
Leo, G.W. (1967) The plutonic and metamorphic rocks of the Ben Lomond Mountain area, Santa Cruz County, California. California Division of Mines and Geology Special Report 91: 41; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 441.
  • Colorado
    • Montrose Co.
      • Uravan District
        • Paradox Valley
Dana 7:I:602.
  • Connecticut
    • Fairfield Co.
      • Danbury
Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury, Connecticut: 185, 224-6.; Januzzi, Ronald E. (1994), Mineral Data Book - Western Connecticut and Environs. The Mineralogical Press, Danbury, Connecticut.
  • Florida
    • De Soto Co.
USGS Circular 1059 pp129-137
Canadian Mineralogist Vol.24, pp. 791 (1986)
    • Polk Co.
Marc V. Hurst (2012) Central Florida Phosphate District. Southeastern Geological Society Field Trip Guidebook No. 57
  • Georgia
    • Decatur Co.
Canadian Mineralogist Vol.24, pp. 791 (1986)
    • Thomas Co.
Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
  • Idaho
    • Lemhi Co.
Ream, Lanny R. 2004. Idaho Minerals, 2nd edition, Revised and Updated
  • Michigan
    • Marquette Co.
      • Marquette iron range
        • Palmer
Identified and verified by SEM/EDS and XRD by George Robinson 2010
  • Minnesota
    • St. Louis Co.
      • Mesabi Range
        • Babbitt
Ross, Malcolm et al. (2007): The search for asbestos within the Peter Mitchell Taconite iron ore mine, near Babbitt, Regulatory Toxicology and PharmacologyVolume 52, Issue 1, Supplement 1, October 2008, Pages S43-S50
  • Missouri
    • Washington Co.
      • Sullivan
R&M 73:2 pp 98-117
  • Montana
    • Silver Bow Co.
      • Butte District (Summit Valley District)
        • Butte
The Mineralogy of The Butte District, Montana; Guilbert and Zeihen 1964
  • Nevada
    • Clark Co.
      • McClanahan District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Spring Mts
NBMG Spec. Pub. 31 Minerals of Nevada
    • Elko Co.
      • Ferber District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Lincoln Co.
NBMG Spec. Pub. 31 Minerals of Nevada
    • Nye Co.
      • Amargosa Desert
Rocks & Minerals, Nov. 1999.
Guven, Necip and Carney, LeRoy L. (1979) The Hydrothermal Transformation of Sepiolite to Stevensite and the Effect of Added Chlorides and Hydroxides, Clays and Clay Minerals, 27:253-260.
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Jersey
    • Somerset Co.
      • Bernards Township
Maertens, J. (2007) Collecting Minerals at Tilcon's Millington Quarry. The Tilcon Times, Summer:10.
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Germine, M.: Environmental Research:42:386-389 (1987); Dunn(1995):Pt4:504.
  • New Mexico
    • Grant Co.
Minerals of New Mexico 3rd ed.
        • Bear Creek Area
Minerals of New Mexico 3rd ed.
      • Meerschaum District
USGS Bull 1451
USGS Bull 1451
USGS Bull 1451
    • McKinley Co.
      • Red Lake volcanic field
Minerals of New Mexico 3rd ed.
  • New York
John H. Betts (2009) "The minerals of New York City", Rocks & Minerals, 84, 204-240.
    • Putnam Co.
      • Patterson
New York State Museum collection
    • St. Lawrence Co.
      • Balmat-Edwards Zinc District
NY State Museum spec. no. 13870
Brindley, G. W. (1959) X-ray and Electron Diffraction Data for Sepiolite, American Mineralogist 44:495-500.
      • Talcville
Rocks & Min. V.71, No.3; Rocks & Minerals 82:472-483
    • Clay Co.
Hadley, Jarvis B.,(1945) Preliminary report On Corundum Deposit In The Buck Creek Peridotite, Clay County, North Carolina: U.S Department of the Interior:Bulletion 948-E
    • Jackson Co.
      • Webster-Balsam
Dana,E.S,1892,A System of Mineralogy,6th edition,pg 681
  • Oregon
    • Douglas Co.
      • Riddle District
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
  • Pennsylvania
    • Chester Co.
      • State Line Chromite District
        • West Nottingham Township
Mineralogy of Pennsylvania - 1922; Samuel S. Gordon, pg. 181
www.libraries.psu.edu/emsl/guides/X/delaware.htm.
  • Rhode Island
    • Providence Co.
Miller, 1971. RI Minerals & Their Locations
  • Utah
    • Duchesne Co.
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Salt Lake Co.
      • Wasatch Mts
        • Big Cottonwood District
          • Argenta
UGMS Bull 117 Minerals and Mineral Localities of Utah; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • San Juan Co.
      • White Canyon District
        • White Canyon
UGMS Bull 117 Minerals and Mineral Localities of Utah; USGS TEI #514
    • Tooele Co.
      • Deep Creek Mts
        • Gold Hill District (Clifton District)
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Oquirrh Mts
        • Rush Valley District (Stockton District)
UGMS Bull 117 Minerals and Mineral Localities of Utah
  • Vermont
Rocks & Min. vol. 71, (1996)
  • Washington
    • Skagit Co.
      • Mount Vernon
Rocks & Min.: 14:112-113.
    • Stevens Co.
Werner, R., (2006), Fibrous Sepiolite from Stevens County, Washington. Mineral News, May, 2006 May Issue
    • Whatcom Co.
Minerals of Washington, Bart Cannon, 1975
  • Wyoming
    • Sweetwater Co.
MILTON, C. (1977): Mineralogy of the Green River Formation. Mineralogical Record 8, 368-379.
Venezuela
 
  • Miranda
Urbani, 1997. Bol. Soc. Venezolana de Espeleología, no.30.
Franco Urbani (2009) Venezuelan Cave Minerals: Second Review. Mineralogy 1 2009 ICS Proceedings. In 15th International Congress of Speleology. p 345
Mineral and/or Locality  
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