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
Stubbetorps Sarvgöl, Kolmården, Norrköping, Östergötland County, Sweden


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 Stubbetorps Sarvgöl, Kolmården, Norrköping, Östergötland County, Sweden
Data Identifiers
Mindat Occurrence Record ID:1788167
Long-form Identifier:1:3:1788167:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
22.7km (14.1 miles) ⓘJönåker, Nyköping, Södermanland County, Sweden
31.1km (19.3 miles) ⓘSätra Mine, Doverstorp ore field, Finspång, Östergötland County, Sweden
56.6km (35.2 miles) ⓘÅtvidaberg licence area, Åtvidaberg Mining Field, Åtvidaberg, Östergötland County, Sweden
63.0km (39.1 miles) ⓘSkrikerum Mine, Valdemarsvik, Östergötland County, Sweden
68.5km (42.6 miles) ⓘBredsjönäs Mines, Åker, Strängnäs, Södermanland County, Sweden
71.4km (44.4 miles) ⓘZinkgruvan mine, Zinkgruvan, Askersund, Örebro County, Sweden
76.5km (47.5 miles) ⓘVena Mines, Hammar, Askersund, Örebro County, Sweden
79.6km (49.4 miles) ⓘÅmme mines, Askersund, Örebro County, Sweden
81.7km (50.8 miles) ⓘHamre bergtäkt, Arboga, Västmanland County, Sweden
86.4km (53.7 miles) ⓘOlserum, Gamleby, Västervik, Kalmar County, Sweden
References
Sundius, N. (1951) Kvarts, fältspat och glimmer samt förekomster därav i Sverige. Sveriges Geologiska Undersökning (SGU), Serie C 520, Årsbok 45pp.143-144
 
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