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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Biotite from
Mars stream alluvial deposits, Anglards-de-Salers, Salers, Mauriac, Cantal, Auvergne-Rhône-Alpes, France


Locality type:Alluvials
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Mars stream alluvial deposits, Anglards-de-Salers, Salers, Mauriac, Cantal, Auvergne-Rhône-Alpes, France
Data Identifiers
Mindat Occurrence Record ID:855474
Long-form Identifier:1:3:855474:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
12.5km (7.8 miles) ⓘPuy de Menoyre, Menet, Mauriac, Cantal, Auvergne-Rhône-Alpes, France
22.6km (14.0 miles) ⓘJordanne stream alluvial deposits, Lascelle, Aurillac, Cantal, Auvergne-Rhône-Alpes, France
24.4km (15.2 miles) ⓘLes Chazes (Puy Griou), Saint-Jacques-des-Blats, Aurillac, Cantal, Auvergne-Rhône-Alpes, France
26.2km (16.3 miles) ⓘCantal Volcano, Thiézac, Aurillac, Cantal, Auvergne-Rhône-Alpes, France
27.2km (16.9 miles) ⓘSantoire stream alluvial deposits, Ségur-les-Villas, Saint-Flour, Cantal, Auvergne-Rhône-Alpes, France
31.4km (19.5 miles) ⓘAlbepierre road, Albepierre-Bredons, Saint-Flour, Cantal, Auvergne-Rhône-Alpes, France
36.8km (22.9 miles) ⓘBurande stream alluvial deposits, Larodde, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
37.9km (23.5 miles) ⓘGagne stream alluvial deposits, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
39.7km (24.7 miles) ⓘAyssard stream alluvial deposits, La Tour-d'Auvergne, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
40.8km (25.4 miles) ⓘChareire stream alluvial deposits, Chareire, Picherande, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
References
Périnet, François (n.d.) Personal communication.
 
and/or  
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