Sphalerite
A valid IMA mineral species - grandfathered
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About Sphalerite
Formula:
ZnS
Colour:
Yellow, light to dark brown, black, red-brown, colourless, light blue. green
Lustre:
Adamantine, Resinous
Hardness:
3½ - 4
Specific Gravity:
3.9 - 4.1
Crystal System:
Isometric
Member of:
Name:
Originally called blende in 1546 by Georgius Agricola (Georg Bauer). Known by a variety of chemical-based names subsequent to Agricola and before Glocker, including "zincum". Named Sphalerite in 1847 by Ernst Friedrich Glocker from the Greek ÏÏαλΔÏοζ "sphaleros" = treacherous, in allusion to the ease with which dark varieties were mistaken for galena, but yielded no lead.
Polymorph of:
Sphalerite Group.
Sphalerite, also known as blende or zinc blende, is the major ore of zinc. When pure (with little or no iron) it forms clear to white crystals (known as Cleiophane). Yellow to orange sphalerite is often called "golden sphalerite." Red shades of sphalerite are known as Ruby Blende or Ruby Jack. As iron content increases, sphalerite forms dark, opaque submetallic crystals (known as Marmatite or Black Jack).
Very rarely, green crystals owe their colour to trace amounts of Co (Henn & Hofmann, 1985; Rager et al., 1996).
Sphalerite may also contain considerable Mn, grading into alabandite. Samples containing up to 0.36 apfu (atoms per formula unit) Mn (21.4 wt.% MnO) have been described by Hurai & HuraiovĂĄ (2011). It can also be Hg-rich and form a series with metacinnabar.
Sphalerite is an important source of rare metals like gallium (Ga) and indium (In), and the semi-metal germanium (Ge). The one from the Restauradora vein of the Capillitas deposit, Argentina, bears a record, at 24.89 wt% In (and 13.49 wt% Cu) it is, astonishingly, still a sphalerite. (MĂĄrquez-ZavalĂa et al. 2024).
See "Best Minerals" article on the schalenblende variety, by Harjo Neutkens: https://www.mindat.org/a/best_schalenblende
According to HaussĂŒhl and MĂŒller (1963), there are numerous polytypes; the ones identified by them are 3R (=3C); 2H, 4H, 6H; and 9R, 12R, 15R and 21R. Note that this can be taken to infer that âwurtziteâ (all the H polytypes) is merely a series of polytypes of sphalerite!
Compare UM1993-16-S:CdInZn and UM1993-15-S:CdInZn.
Sphalerite, also known as blende or zinc blende, is the major ore of zinc. When pure (with little or no iron) it forms clear to white crystals (known as Cleiophane). Yellow to orange sphalerite is often called "golden sphalerite." Red shades of sphalerite are known as Ruby Blende or Ruby Jack. As iron content increases, sphalerite forms dark, opaque submetallic crystals (known as Marmatite or Black Jack).
Very rarely, green crystals owe their colour to trace amounts of Co (Henn & Hofmann, 1985; Rager et al., 1996).
Sphalerite may also contain considerable Mn, grading into alabandite. Samples containing up to 0.36 apfu (atoms per formula unit) Mn (21.4 wt.% MnO) have been described by Hurai & HuraiovĂĄ (2011). It can also be Hg-rich and form a series with metacinnabar.
Sphalerite is an important source of rare metals like gallium (Ga) and indium (In), and the semi-metal germanium (Ge). The one from the Restauradora vein of the Capillitas deposit, Argentina, bears a record, at 24.89 wt% In (and 13.49 wt% Cu) it is, astonishingly, still a sphalerite. (MĂĄrquez-ZavalĂa et al. 2024).
See "Best Minerals" article on the schalenblende variety, by Harjo Neutkens: https://www.mindat.org/a/best_schalenblende
According to HaussĂŒhl and MĂŒller (1963), there are numerous polytypes; the ones identified by them are 3R (=3C); 2H, 4H, 6H; and 9R, 12R, 15R and 21R. Note that this can be taken to infer that âwurtziteâ (all the H polytypes) is merely a series of polytypes of sphalerite!
Compare UM1993-16-S:CdInZn and UM1993-15-S:CdInZn.
Visit gemdat.org for gemological information about Sphalerite.
Unique Identifiers
Mindat ID:
3727
Long-form identifier:
mindat:1:1:3727:9
GUID
(UUID V4):
(UUID V4):
eabaeb2d-b2bc-4149-bd2d-e1dfdf17a050
IMA Classification of Sphalerite
Approved, 'Grandfathered' (first described prior to 1959)
Classification of Sphalerite
2.CB.05a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.8.2.1
2 : SULFIDES
8 : AmXp, with m:p = 1:1
2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.4.4
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
4 : Sulphides etc. of Group II metals other than Hg (Mg, Ca, Zn, Cd)
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
4 : Sulphides etc. of Group II metals other than Hg (Mg, Ca, Zn, Cd)
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Sp | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Sp | Kretz (1983) | Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277â279. |
Sp | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
Sp | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185â187 doi:10.2138/am.2010.3371 |
Sp | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Sphalerite
Adamantine, Resinous
Transparency:
Transparent, Translucent
Colour:
Yellow, light to dark brown, black, red-brown, colourless, light blue. green
Streak:
Pale yellow to brown.
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN100=208 - 224 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
Perfect {011}
Perfect {011}
Fracture:
Conchoidal
Density:
3.9 - 4.1 g/cm3 (Measured) 4.096 g/cm3 (Calculated)
Optical Data of Sphalerite
Type:
Isotropic
RI values:
nα = 2.369
Birefringence:
May show strain induced birefringence
Surface Relief:
Moderate
Reflectivity:
Wavelength | R |
---|---|
400nm | 19.6% |
420nm | 19.0% |
440nm | 18.3% |
460nm | 17.9% |
480nm | 17.5% |
500nm | 17.2% |
520nm | 16.9% |
540nm | 16.7% |
560nm | 16.5% |
580nm | 16.4% |
600nm | 16.3% |
620nm | 16.2% |
640nm | 16.1% |
660nm | 16.0% |
680nm | 15.9% |
700nm | 15.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 19.6%.
Colour in reflected light:
Medium gray
Internal Reflections:
White, yellow, red, brown
Pleochroism:
Non-pleochroic
Chemistry of Sphalerite
Mindat Formula:
ZnS
Elements listed:
Common Impurities:
Fe,Mn,Cd,Hg,In,Tl,Ga,Ge,Sb,Sn,Pb,Ag,Co
Age distribution
Recorded ages:
Phanerozoic : 519 Ma to 0 Ma - based on 23 recorded ages.
Crystallography of Sphalerite
Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
F4 3m
Cell Parameters:
a = 5.406 Å
Unit Cell V:
157.99 Ă
Âł (Calculated from Unit Cell)
Z:
4
Twinning:
{111}
Crystallographic forms of Sphalerite
Crystal Atlas:
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0000110 | Sphalerite | Skinner B J (1961) Unit-cell edges of natural and synthetic sphalerites American Mineralogist 46 1399-1411 | 1961 | synthetic | 0 | 293 | |
0018098 | Sphalerite | de Jong W (1927) Marmatit und christophit _cod_database_code 1011232 Zeitschrift fur Kristallographie 66 515-515 | 1927 | 0 | 293 | ||
0018099 | Sphalerite | de Jong W (1927) Marmatit und christophit _cod_database_code 1011233 Zeitschrift fur Kristallographie 66 515-515 | 1927 | 0 | 293 | ||
0018328 | Sphalerite | Nitta E, Kimata M, Hoshino M, Echigo T, Hamasaki S, Nishida N, Shimizu M, Akasak T (2008) Crystal chemistry of ZnS minerals formed as high-temperature volcanic sublimates: matraite identical with sphalerite Journal of Mineralogical and Petrological Sciences 103 145-151 | 2008 | Iwodake volcano, Satsuma-Iwojima, Kyushu, SW Japan | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
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Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.123 Ă | (100) |
2.705 Ă | (10) |
1.912 Ă | (51) |
1.633 Ă | (30) |
1.561 Ă | (2) |
1.351 Ă | (6) |
1.240 Ă | (9) |
1.209 Ă | (2) |
1.1034 Ă | (9) |
1.0403 Ă | (5) |
0.9557 Ă | (3) |
0.9138 Ă | (5) |
0.8548 Ă | (3) |
0.8244 Ă | (2) |
Comments:
ICDD 5-566 (synthetic). Similar data to that of cerianite-(Ce).
Geological Environment
Paragenetic Mode(s):
Synonyms of Sphalerite
Other Language Names for Sphalerite
Bosnian:Sfalerit
Catalan:Esfalerita
Czech:Sfalerit
Dutch:Zinkblende
Farsi/Persian:ŰšÙÙۯ۱ÙÛ
Finnish:SinkkivÀlke
French:Sphalérite
German:Sphalerit
Blende
Brunckit
Marasmolit
Zinkblende
Rubinblende (in part)
Blende
Brunckit
Marasmolit
Zinkblende
Rubinblende (in part)
Hebrew:ŚĄŚ€ŚŚšŚŚ
Hungarian:Szfalerit
Italian:Sfalerite
Japanese:éäșéé±
Latvian:Sfalerīts
Lithuanian:Sfaleritas
Low Saxon/Low German:Sphalerit
Norwegian:Sinkblende
Norwegian (Nynorsk):Sinkblende
Polish:Sfaleryt
Portuguese:Blenda
Romanian:BlendÄ
Russian:ĐĄŃалДŃĐžŃ
Simplified Chinese:éȘéçż
Slovak:Sfalerit
Spanish:Blenda
Esfalerita
Esfalerita
Swedish:ZinkblÀnde
Traditional Chinese:éé
瀊
Ukrainian:ĐĄŃалДŃĐžŃ
Varieties of Sphalerite
Cadmium-bearing Sphalerite | A Cd-bearing variety of sphalerite. Rather common. Reported, e.g., from La Fossa fumaroles, Italy. |
Cleiophane | Cleiophane is colorless to white or green sphalerite due to low contents of Fe" and Mn". Yellow gemmy sphalerite is called "golden sphalerite." First reported from Franklin, Franklin Mining District, Sussex Co., New Jersey, USA. |
Cockade sphalerite | A textural variety of sphalerite or an ore type (see cockade ore) showing botryoidal or ring-like structures. Schalenblende is effectively identical. Further English synonyms: ring ore, sphere ore, cocarde ore. Equivalent German terms are "Kokardenerz" an... |
Gem Blende | A ruby-red translucent variety of "blende" (= sphalerite), the translucency increases the lower the iron content |
Honigblende | German name for honey-coloured sphalerite. |
Indium-bearing Sphalerite | An In-bearing variety of sphalerite. It is usually also Cu-rich (coupled substitution of Cu+ + In3+ <-> 2Zn2+). In contents close to 22 wt.% are reported by Márquez-Zavalía et al. (2020). |
Kokardenerz | An ore type showing ring-like structures. From French "cocarde", meaning cockade. "Ringelerz" is another German designation. In English: ring ore, sphere ore, cocarde ore, cockade ore. Mainly shown by sphalerite and galena. |
Marmatite | An opaque, (macroscopically) black, iron-rich variety of sphalerite. |
Mercury-bearing Sphalerite | A mercury-bearing variety of sphalerite. See also Polhemusite |
MĂĄtraite | A densely twinned columnar variety of sphalerite. Discredited as 2006-C. Nitta et al. (2008) showed that the sphalerite is twinned on {111}. Originally reported from Gyöngyösoroszi, Mátra Mts., Heves Co., Hungary. |
Przibramite (of Huot) | A variety of sphalerite with up to 2% Cd. |
Relationship of Sphalerite to other Species
Member of:
Other Members of this group:
Browneite | MnS | Iso. 4 3m : F4 3m |
Coloradoite | HgTe | Iso. 4 3m : F4 3m |
Hawleyite | CdS | Iso. 4 3m : F4 3m |
Ishiharaite | (Cu,Ga,Fe,In,Zn)S | Iso. 4 3m : F4 3m |
Metacinnabar | HgS | Iso. 4 3m : F4 3m |
Rudashevskyite | (Fe,Zn)S | Iso. 4 3m : F4 3m |
Stilleite | ZnSe | Iso. 4 3m : F4 3m |
Tiemannite | HgSe | Iso. 4 3m : F4 3m |
Common Associates
Associated Minerals Based on Photo Data:
7,600 photos of Sphalerite associated with Quartz | SiO2 |
5,228 photos of Sphalerite associated with Galena | PbS |
4,648 photos of Sphalerite associated with Calcite | CaCO3 |
4,134 photos of Sphalerite associated with Pyrite | FeS2 |
3,252 photos of Sphalerite associated with Chalcopyrite | CuFeS2 |
3,097 photos of Sphalerite associated with Fluorite | CaF2 |
2,215 photos of Sphalerite associated with Dolomite | CaMg(CO3)2 |
1,692 photos of Sphalerite associated with Siderite | FeCO3 |
1,124 photos of Sphalerite associated with Baryte | BaSO4 |
753 photos of Sphalerite associated with Marcasite | FeS2 |
Related Minerals - Strunz-mindat Grouping
2.CB. | Agmantinite | Ag2MnSnS4 |
2.CB. | Richardsite | Zn2CuGaS4 |
2.CB. | Gachingite | Au(Te1-xSex) |
2.CB. | Tolstykhite | Au3S4Te6 |
2.CB. | Hanswilkeite | KFeS2 |
2.CB. | Auroselenide | AuSe |
2.CB. | Ruizhongite | (Ag2â»)Pb3Ge2S8 |
2.CB. | Okruginite | Cu2SnSe3 |
2.CB.05a | Coloradoite | HgTe |
2.CB.05a | Hawleyite | CdS |
2.CB.05a | Metacinnabar | HgS |
2.CB.05c | Polhemusite | (Zn,Hg)S |
2.CB.05b | Sakuraiite | (Cu,Zn,Fe)3(In,Sn)S4 |
2.CB.05a | Stilleite | ZnSe |
2.CB.05a | Tiemannite | HgSe |
2.CB.05 | UM1998-15-S:CuFeZn | Cu2Fe3Zn5S10 |
2.CB.05a | Rudashevskyite | (Fe,Zn)S |
2.CB.05a | Ishiharaite | (Cu,Ga,Fe,In,Zn)S |
2.CB.07a | Shenzhuangite | NiFeS2 |
2.CB.07a | Unnamed (Cu-Mn-Sn Sulpide) | Cu2MnSnS4 |
2.CB.10a | Chalcopyrite | CuFeS2 |
2.CB.10a | Eskebornite | CuFeSe2 |
2.CB.10a | Gallite | CuGaS2 |
2.CB.10b | Haycockite | Cu4Fe5S8 |
2.CB.10a | Lenaite | AgFeS2 |
2.CB.10b | Mooihoekite | Cu9Fe9S16 |
2.CB.10b | Putoranite | Cu1.1Fe1.2S2 |
2.CB.10a | Roquesite | CuInS2 |
2.CB.10b | Talnakhite | Cu9(Fe,Ni)8S16 |
2.CB.10a | LaforĂȘtite | AgInS2 |
2.CB.10a | Unnamed (Cu-Zn-In Sulphide) | CuZn2InS4 |
2.CB.10a | UM1984-30-S:CuFeSn | Cu2Fe2Sn3S7 |
2.CB.10c | Omariniite | Cu8Fe2ZnGe2S12 |
2.CB.15a | ÄernĂœite | Cu2(Cd,Zn,Fe)SnS4 |
2.CB.15a | Ferrokësterite | Cu2FeSnS4 |
2.CB.15a | Hocartite | Ag2(Fe2+,Zn)SnS4 |
2.CB.15a | Idaite | Cu5FeS6 |
2.CB.15a | KĂ«sterite | Cu2ZnSnS4 |
2.CB.15a | Kuramite | Cu3SnS4 |
2.CB.15b | Mohite | Cu2SnS3 |
2.CB.15a | Pirquitasite | Ag2ZnSnS4 |
2.CB.15a | Stannite | Cu2FeSnS4 |
2.CB.15c | Stannoidite | Cu+6Cu2+2(Fe2+,Zn)3Sn2S12 |
2.CB.15a | Velikite | Cu2HgSnS4 |
2.CB.15c | UM2006-11-S:CuFeGeZn | Cu8(Fe,Zn)3Ge2S12 (?) |
2.CB.17a v | Arsenic-bearing Renierite | Cu11GeAsFe4S16 |
2.CB.20 | Chatkalite | Cu6FeSn2S8 |
2.CB.20 | Mawsonite | Cu6Fe2SnS8 |
2.CB.30 | Argyropyrite | near Ag2Fe7S11 |
2.CB.30 | Colusite | Cu13VAs3S16 |
2.CB.30 | Germanite | Cu13Fe2Ge2S16 |
2.CB.30 | Germanocolusite | Cu26V2(Ge,As)6S32 |
2.CB.30 | Nekrasovite | Cu26V2(Sn,As,Sb)6S32 |
2.CB.30 | Stibiocolusite | Cu13V(Sb,Sn,As)3S16 |
2.CB.30 | Ovamboite | Cu20(Fe,Cu,Zn)6W2Ge6S32 |
2.CB.30 | Maikainite | Cu20(Fe,Cu)6Mo2Ge6S32 |
2.CB.30 | Frieseite | Ag2Fe5S8 (?) |
2.CB.35a | Hemusite | Cu6SnMoS8 |
2.CB.35a | Kiddcreekite | Cu6SnWS8 |
2.CB.35a | Polkovicite | (Fe,Pb)3(Ge,Fe)1-xS4 |
2.CB.35a | Renierite | (Cu1+,Zn)11Fe4(Ge4+,As5+)2S16 |
2.CB.35a | Vinciennite | Cu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16 |
2.CB.35a | Morozeviczite | (Pb,Fe)3Ge1-xS4 |
2.CB.35b | Catamarcaite | Cu6GeWS8 |
2.CB.40 | Lautite | CuAsS |
2.CB.42 | Lingbaoite | AgTe3 |
2.CB.45 | Cadmoselite | CdSe |
2.CB.45 | Greenockite | CdS |
2.CB.45 | Wurtzite | (Zn,Fe)S |
2.CB.45 | Rambergite | MnS |
2.CB.45 | Buseckite | (Fe,Zn,Mn)S |
2.CB.45 | Maletoyvayamite | Au3Se4Te6 |
2.CB.47 | Murchisite | Cr5S6 |
2.CB.50 | Zincselenide | ZnSe |
2.CB.50 | Wassonite | TiS |
2.CB.52 | Dzhezkazganite | ReMoCu2PbS6 ? |
2.CB.55a | Cubanite | CuFe2S3 |
2.CB.55b | Isocubanite | CuFe2S3 |
2.CB.60 | Picotpaulite | TlFe2S3 |
2.CB.60 | Raguinite | TlFeS2 |
2.CB.65 | Argentopyrite | AgFe2S3 |
2.CB.65 | Sternbergite | AgFe2S3 |
2.CB.70 | Sulvanite | Cu3VS4 |
2.CB.75 | Vulcanite | CuTe |
2.CB.80 | Empressite | AgTe |
2.CB.85 | Muthmannite | AuAgTe2 |
Fluorescence of Sphalerite
Light colored sphalerite may fluoresce in blue or orange in LW. Fluoresces less strongly, sometimes not at all, in SW or MW.
Other Information
Health Risks:
May be rich in some toxic elements, eg Cd, Hg.
Sphalerite in petrology
An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.
Internet Links for Sphalerite
mindat.org URL:
https://www.mindat.org/min-3727.html
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References for Sphalerite
Reference List:
Significant localities for Sphalerite
Showing 41 significant localities out of 25,374 recorded on mindat.org.
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Austria | |
| Niedermayr et al. (1995) |
Canada | |
| Reiner Mielke +1 other reference |
France | |
| Belot (1978) |
| Mines +1 other reference |
| J F Carpenter specimen |
Germany | |
| Kirill Vlasov |
| Lapis 2005 (30) |
Ireland | |
| Barry Flannery (Personal Collection) +2 other references |
| Barry Flannery Collection. +1 other reference |
Barry Flannery Collection +1 other reference | |
Moreton (1999) | |
Italy | |
| Biagioni et al. (2008) |
| Benvenuti et al. (2000) |
Dini (1995) | |
| Orlandi et al. (2004) |
| Cioffi M. (Alpi Apuane) +1 other reference |
Kazakhstan | |
| RWMW specimen +2 other references |
Kosovo | |
| Joana KoĂ Odziejczyk et al. ( 2012) +3 other references |
Norway | |
| Neumann (1944) |
| Torkelsen (1993) |
Peru | |
| Mineralogical Record 28 (1997) +2 other references |
| Econ Geol (1985) +1 other reference |
| Mineralogical Record 28 (1997) +1 other reference |
| Mi.Rec. 28 (1997) |
| Burkart-Baumann +2 other references |
Poland | |
| Andrzejewski K. (1993) |
Romania | |
| MĂąrza +10 other references |
Russia | |
| Dobovol'skaya et al. (1990) +3 other references |
South Africa | |
| Wilson (2001) |
Spain | |
| Calvo et al. (1993) +1 other reference |
| GĂłmez FernĂĄndez et al. (2006) |
| [var: Marmatite] Calvo (2003) |
Switzerland | |
| Graeser et al. (1987) |
UK | |
| Dunham K C |
| David Baldwin |
USA | |
| Januzzi (1994) +1 other reference |
| Fluorite: The Collector's Choice. Extra ... +8 other references |
| J. Zolan +2 other references |
| J. Wingard |
| Sherwood et al. (1998) |
| [var: Cleiophane] |
| Kyle (1976) +2 other references |
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Lengenbach Quarry, FĂ€ld, Binn, Goms, Valais, Switzerland