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
Booysendal North Mine, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa


Locality type:Mine
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 Booysendal North Mine, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa
Data Identifiers
Mindat Occurrence Record ID:1209762
Long-form Identifier:1:3:1209762:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
10.8km (6.7 miles) ⓘHelena Chrome Mine, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa
30.8km (19.2 miles) ⓘSpitskop Alkaline Igneous Complex, Makhuduthamaga Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa
34.9km (21.7 miles) ⓘOnverwacht Mine, Steelpoort, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa
59.9km (37.2 miles) ⓘMooihoek Farm 255 KT, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa
79.0km (49.1 miles) ⓘAnnesley andalusite mine, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa
87.0km (54.0 miles) ⓘHavercroft andalusite mine, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa
88.0km (54.7 miles) ⓘNkomati Mine, Uitkomst Complex, Waterval, Chief Albert Luthuli Local Municipality, Gert Sibande District Municipality, Mpumalanga, South Africa
88.4km (54.9 miles) ⓘUitkomst Complex, Waterval, Chief Albert Luthuli Local Municipality, Gert Sibande District Municipality, Mpumalanga, South Africa
References
McCall, M. J. (2016). Mineralogical and geochemical variations in the UG2 reef at Booysendal and Zondereinde mines, with implications for beneficiation of PGM (Doctoral dissertation, Stellenbosch: Stellenbosch University).
 
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