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


Locality type:Occurrence
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 Putsberg, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
Data Identifiers
Mindat Occurrence Record ID:1748040
Long-form Identifier:1:3:1748040:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
43.5km (27.1 miles) ⓘAdjoining Geelvloer, Kai !Garib Local Municipality, ZF Mgcawu District Municipality, Northern Cape, South Africa
56.4km (35.0 miles) ⓘOup 80 Farm, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
77.7km (48.3 miles) ⓘAggeneys, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
88.6km (55.1 miles) ⓘBlack Mountain (Swartberg mine), Aggeneys, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa
References
Rozendaal, A., Rudnick, T-K., Heyn, R. (2017) Mesoproterozoic base metal sulphide deposits in the Namaqua Sector of the Namaqua-Natal Metamorphic Province, South Africa: a review. South African Journal of Geology, 120 (1) 153-186 doi:10.25131/gssajg.120.1.153
 
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