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
Wilcza Góra quarry, Wilków, Gmina Złotoryja, 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 Wilcza Góra quarry, Wilków, Gmina Złotoryja, Złotoryja County, Lower Silesian Voivodeship, Poland
Data Identifiers
Mindat Occurrence Record ID:1393836
Long-form Identifier:1:3:1393836:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
8.5km (5.3 miles) ⓘWielisławka Hill, Sędziszowa, Gmina Świerzawa, Złotoryja County, Lower Silesian Voivodeship, Poland
22.0km (13.7 miles) ⓘSwarna quartz veins, Kwietniki, Gmina Paszowice, Jawor County, Lower Silesian Voivodeship, Poland
22.2km (13.8 miles) ⓘPaszowice quarry, Gmina Paszowice, Jawor County, Lower Silesian Voivodeship, Poland
22.9km (14.2 miles) ⓘŚwiny rhyolite quarry, Świny, Gmina Bolków, Jawor County, Lower Silesian Voivodeship, Poland
24.1km (14.9 miles) ⓘWolbromek rhyolite quarry, Wolbromek, Gmina Bolków, Jawor County, Lower Silesian Voivodeship, Poland
27.3km (17.0 miles) ⓘWekom II quarry, Kostrza, Gmina Strzegom, Świdnica County, Lower Silesian Voivodeship, Poland
27.9km (17.3 miles) ⓘZłomy granite quarry, Jelenia Góra, Lower Silesian Voivodeship, Poland
28.5km (17.7 miles) ⓘKopki Hill, Jelenia Góra, Lower Silesian Voivodeship, Poland
30.0km (18.6 miles) ⓘCieplice-1 borehole, Cieplice Śląskie-Zdrój, Jelenia Góra, Lower Silesian Voivodeship, Poland
30.6km (19.0 miles) ⓘDzicza Góra, Rędziny, Gmina Kamienna Góra, Kamienna Góra County, Lower Silesian Voivodeship, Poland
References
Kozłowska-Koch, M. (1981). Petrography of ultramafic nodules in the nephelinites from Księginki near Lubań (Lower Silesia). Archiwum Mineralogiczne, 37(1), 33-56.
Smulikowski, K., & Kozłowska-Koch, M. (1984). Basaltoids of Wilcza Góra near Złotoryja (Lower Silesia) and their enclosures. Archiwum Mineralogiczne, 40(1), 53-101.
Matusiak-Małek, Magdalena, Puziewicz, Jacek, Ntaflos, Theodoros, Grégoire, Michel, Kukuła, Anna, Wojtulek, Piotr Marian (2017) Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza Góra (SW Poland), Central Europe. Lithos, 286. 302-323 doi:10.1016/j.lithos.2017.06.017
 
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