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
Zwalisko, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland


Locality type:Mountain
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 Zwalisko, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
Data Identifiers
Mindat Occurrence Record ID:1483834
Long-form Identifier:1:3:1483834:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.0km (0.6 miles) ⓘStanisław Quarry, Kopaniec, Gmina Stara Kamienica, Karkonosze County, Lower Silesian Voivodeship, Poland
2.9km (1.8 miles) ⓘPtasie Gniazda Rocks, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
3.2km (2.0 miles) ⓘKarkonosze IG-1 borehole, Jakuszyce, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
3.4km (2.1 miles) ⓘSkalna Brama pegmatite, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
3.8km (2.4 miles) ⓘSzklarska Poręba Huta granite quarry, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
8.7km (5.4 miles) ⓘMichałowice granite quarry, Piechowice, Karkonosze County, Lower Silesian Voivodeship, Poland
8.7km (5.4 miles) ⓘJizerská louka, Jizerka, Kořenov, Jablonec nad Nisou District, Liberec Region, Czech Republic
9.1km (5.7 miles) ⓘOld leucogranite quarry, Kotlina, Gmina Mirsk, Lwówek Śląski County, Lower Silesian Voivodeship, Poland
9.8km (6.1 miles) ⓘSn mine, Gierczyn, Gmina Mirsk, Lwówek Śląski County, Lower Silesian Voivodeship, Poland
11.5km (7.2 miles) ⓘMica slates quarry, Orłowice, Gmina Mirsk, Lwówek Śląski County, Lower Silesian Voivodeship, Poland
References
Kozłowski A., Matyszczak W. (2021) Fluorite and related fluids in the Karkonosze granitoid pluton, SW Poland. Acta Geologica Polonica (in press - March 2022) P.1-23
 
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