Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Geffroyite from
Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France


01962590017271923329158.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
01947400017367013235388.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
03441170017367030388688.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
02627440017367013227964.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
07373290017367013223370.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
03441170017367030388688.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
01962590017271923329158.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
08552470017367030382024.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
03441170017367030388688.jpg
Geffroyite, etc.

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Locality type:Deposit
Classification
Species:Geffroyite
Formula:(Cu,Fe,Ag)9(Se,S)8
Confirmation
Validity:Valid - Type Locality
Associated Minerals Based on Photo Data:
Eskebornite3
Uraninite3
Data
Mineral Data:Click here to view Geffroyite data
Locality Data:Click here to view Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Data Identifiers
Mindat Occurrence Record ID:73326
Long-form Identifier:1:3:73326:9
GUID (UUID V4):0
References
Johan, Z.; Picot, P.; Ruhlmann, F. (1982) Evolution paragénétique de la minéralisation uranifère de Chaméane (Puy-de-Dôme), France: chaméanite, geffroyite et giraudite, trois séléniures nouveaux de Cu, Fe, Ag et As. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 29 (3). 151-167 doi:10.1007/bf01084639
Simon, Grigore, Kesler, Stephen E., Essene, Eric J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92 (4) 468-484 doi:10.2113/gsecongeo.92.4.468
 
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