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
Norabees I pegmatite, Norrabees pegmatites I-VI, 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 Norabees I pegmatite, Norrabees pegmatites I-VI, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
Data Identifiers
Mindat Occurrence Record ID:1865737
Long-form Identifier:1:3:1865737:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.3km (0.8 miles) ⓘNorrabees pegmatites I-VI, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
16.2km (10.1 miles) ⓘKokerboomrand pegmatite, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
25.1km (15.6 miles) ⓘNoumas I pegmatite (Blesberg), Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
29.6km (18.4 miles) ⓘHaib River copper-molybdenum deposit, Tsams Farm 685, Karasburg West, ǁKaras Region, Namibia
51.4km (31.9 miles) ⓘHotson 6 Mine, Koenabib farm, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
68.8km (42.8 miles) ⓘKliphoog Mine, Concordia, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
71.7km (44.5 miles) ⓘNarrap Mine, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
72.5km (45.0 miles) ⓘOkiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
74.3km (46.2 miles) ⓘNababeep Mine, Nababeep, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
74.4km (46.2 miles) ⓘNababeep West Mine (Nababeep Near West mine), Nababeep tungsten mines, Nababeep, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
References
Von Backstroem, JW (1973) Pegmatite deposits in the Republic of South Africa. Atomic Energy Board, Pelindaba, Pretoria (South Africa)
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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