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
Aggeneys, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa


Locality type:Farm
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 Aggeneys, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
Data Identifiers
Mindat Occurrence Record ID:250095
Long-form Identifier:1:3:250095:9
GUID (UUID V4):0
Localities for Biotite in this Region
Black Mountain (Swartberg mine), Aggeneys, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
Nearest other occurrences of Biotite
10.9km (6.8 miles) ⓘBlack Mountain (Swartberg mine), Aggeneys, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
37.9km (23.5 miles) ⓘHotson 6 Mine, Koenabib farm, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
58.0km (36.0 miles) ⓘTantalite Valley, Karasburg East, ǁKaras Region, Namibia
77.7km (48.3 miles) ⓘPutsberg, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
87.2km (54.2 miles) ⓘOup 80 Farm, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
89.2km (55.4 miles) ⓘNorabees I pegmatite, Norrabees pegmatites I-VI, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
90.4km (56.2 miles) ⓘNorrabees pegmatites I-VI, Steinkopf, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
98.2km (61.0 miles) ⓘKoperberg Mine, Carolusberg, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
99.0km (61.5 miles) ⓘNarrap Mine, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
99.8km (62.0 miles) ⓘKliphoog Mine, Concordia, Okiep Copper District, Namakwa District Municipality, Northern Cape, South Africa
References
Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa. p.1-290.
 
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