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
Gross Spitzkoppe, Spitzkoppe area, Dâures Constituency, Erongo Region, Namibia


Locality type:Massif
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:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Gross Spitzkoppe, Spitzkoppe area, Dâures Constituency, Erongo Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:309014
Long-form Identifier:1:3:309014:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.1km (9.4 miles) ⓘKlein Spitzkoppe, Spitzkoppe area, Dâures Constituency, Erongo Region, Namibia
33.4km (20.7 miles) ⓘGaudeanmus Mine, Arandis Constituency, Erongo Region, Namibia
48.0km (29.8 miles) ⓘUsakos tourmaline mine, Usakos, Karibib Constituency, Erongo Region, Namibia
48.3km (30.0 miles) ⓘHenderson Mine (Anderson Mine), Naob Farm 69, Usakos, Karibib Constituency, Erongo Region, Namibia
58.5km (36.4 miles) ⓘValencia deposit, Karibib Constituency, Erongo Region, Namibia
61.4km (38.1 miles) ⓘNavachab Gold Mine, Farm Navachab, Karibib Constituency, Erongo Region, Namibia
73.9km (46.0 miles) ⓘRössing uranium mine, Arandis Constituency, Erongo Region, Namibia
74.3km (46.2 miles) ⓘEtiro pegmatite, Etiro Farm 50, Karibib Constituency, Erongo Region, Namibia
79.7km (49.6 miles) ⓘTwin Hills prospects, Karibib Constituency, Erongo Region, Namibia
85.0km (52.8 miles) ⓘHusab Mine, Arandis Constituency, Erongo Region, Namibia
References
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