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
Jezioro Okragłe, Suwałki Massif, Suwałki County, Podlaskie Voivodeship, Poland


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 Jezioro Okragłe, Suwałki Massif, Suwałki County, Podlaskie Voivodeship, Poland
Data Identifiers
Mindat Occurrence Record ID:614178
Long-form Identifier:1:3:614178:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
19.9km (12.4 miles) ⓘKrzemianka, Suwałki Massif, Suwałki County, Podlaskie Voivodeship, Poland
41.7km (25.9 miles) ⓘElk Complex, Ełk County, Warmian-Masurian Voivodeship, Poland
43.7km (27.2 miles) ⓘTajno alkaline-carbonatite massif, Podlaskie Voivodeship, Poland
References
Morgan, J. W., Stein, H. J., Hannah, J. L., Markey, R. J., Wiszniewska, J. (2000) Re-Os study of Fe-Ti-V oxide and Fe-Cu-Ni sulfide deposits, Suwałki Anorthosite Massif, northeast Poland. Mineralium Deposita, 35 (5) 391-401 doi:10.1007/s001260050251
 
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