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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Tourmaline from
Sioulot stream alluvial deposits, Olby, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France


Locality type:Alluvials
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Sioulot stream alluvial deposits, Olby, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Data Identifiers
Mindat Occurrence Record ID:608290
Long-form Identifier:1:3:608290:1
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
3.9km (2.4 miles) ⓘRoure, Saint-Pierre-le-Chastel, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
12.3km (7.6 miles) ⓘPranal, Bromont-Lamothe, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
22.8km (14.2 miles) ⓘDourioux, Charbonnières-les-Varennes, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
31.4km (19.5 miles) ⓘMortagne stream alluvial deposits, La Guinguette, Singles, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
35.5km (22.1 miles) ⓘLa Panouille stream alluvial deposits, La Vialolle, Labessette, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
39.7km (24.7 miles) ⓘLa Panouille stream alluvial deposits, Journiac, Sarlat-la-Canéda, Dordogne, Nouvelle-Aquitaine, France
40.5km (25.2 miles) ⓘBeaulieu brook alluvial deposits, Beaulieu, Mauriac, Cantal, Auvergne-Rhône-Alpes, France
40.7km (25.3 miles) ⓘThynières gully alluvial deposits, Beaulieu, Mauriac, Cantal, Auvergne-Rhône-Alpes, France
48.3km (30.0 miles) ⓘMine de l'Eperon (La Bosse), Montmins mining district, Échassières, Vichy, Allier, Auvergne-Rhône-Alpes, France
48.5km (30.1 miles) ⓘBeauvoir quarry, Échassières, Vichy, Allier, Auvergne-Rhône-Alpes, France
References
Périnet, François (n.d.) Personal communication.
 
and/or  
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