Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Biotite from
Kokerboomrand pegmatite, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa


Locality type:Pegmatite
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 Kokerboomrand pegmatite, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
Data Identifiers
Mindat Occurrence Record ID:1865698
Long-form Identifier:1:3:1865698:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
10.1km (6.3 miles) ⓘNoumas I pegmatite (Blesberg), Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
15.6km (9.7 miles) ⓘNorrabees pegmatites I-VI, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
16.2km (10.1 miles) ⓘNorabees I pegmatite, Norrabees pegmatites I-VI, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
34.0km (21.1 miles) ⓘHaib River copper-molybdenum deposit, Tsams Farm 685, Karasburg West, ǁKaras Region, Namibia
63.0km (39.1 miles) ⓘKliphoog Mine, Concordia, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
64.4km (40.0 miles) ⓘHotson 6 Mine, Koenabib farm, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
66.1km (41.0 miles) ⓘNababeep West Mine (Nababeep Near West mine), Nababeep tungsten mines, Nababeep, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
66.1km (41.1 miles) ⓘNababeep Mine, Nababeep, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
66.3km (41.2 miles) ⓘNarrap Mine, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
66.7km (41.4 miles) ⓘOkiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
References
Ballouard, Christophe; Elburg, Marlina A.; Tappe, Sebastian; Reinke, Christian; Ueckermann, Henriette; Doggart, Shane (2020) Magmatic-hydrothermal evolution of rare metal pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa). Ore Geology Reviews, 116. doi:10.1016/j.oregeorev.2019.103252
 
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