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
Wielisławka Hill, Sędziszowa, Gmina Świerzawa, Złotoryja County, Lower Silesian Voivodeship, Poland


Locality type:Quarry
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 Wielisławka Hill, Sędziszowa, Gmina Świerzawa, Złotoryja County, Lower Silesian Voivodeship, Poland
Data Identifiers
Mindat Occurrence Record ID:1483696
Long-form Identifier:1:3:1483696:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
8.5km (5.3 miles) ⓘWilcza Góra quarry, Wilków, Gmina Złotoryja, Złotoryja County, Lower Silesian Voivodeship, Poland
19.4km (12.1 miles) ⓘZłomy granite quarry, Jelenia Góra, Lower Silesian Voivodeship, Poland
19.4km (12.1 miles) ⓘSwarna quartz veins, Kwietniki, Gmina Paszowice, Jawor County, Lower Silesian Voivodeship, Poland
19.8km (12.3 miles) ⓘŚwiny rhyolite quarry, Świny, Gmina Bolków, Jawor County, Lower Silesian Voivodeship, Poland
20.0km (12.4 miles) ⓘKopki Hill, Jelenia Góra, Lower Silesian Voivodeship, Poland
21.2km (13.2 miles) ⓘWolbromek rhyolite quarry, Wolbromek, Gmina Bolków, Jawor County, Lower Silesian Voivodeship, Poland
21.7km (13.5 miles) ⓘCieplice-1 borehole, Cieplice Śląskie-Zdrój, Jelenia Góra, Lower Silesian Voivodeship, Poland
22.8km (14.2 miles) ⓘPaszowice quarry, Gmina Paszowice, Jawor County, Lower Silesian Voivodeship, Poland
23.0km (14.3 miles) ⓘDzicza Góra, Rędziny, Gmina Kamienna Góra, Kamienna Góra County, Lower Silesian Voivodeship, Poland
23.4km (14.5 miles) ⓘCieplice granite quarry, Cieplice Śląskie-Zdrój, Jelenia Góra, Lower Silesian Voivodeship, Poland
References
Awdankiewicz, M., Pieczonka, J., Piestrzynski, A., Sawlowicz, Z. (2010) Late Palaeozoic post-orogenic volcanism in the Sudetes Mts. and the Kupferschiefer-type Cu-Ag ore deposits in the Fore-Sudetic Monocline, SW Poland. ACTA Mineralogica-Petrographica Field Guide Series, Vol 18, Szeged, 2010
 
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