Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Biotite from
Ptasie Gniazda Rocks, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland


Locality type:Outcrop
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:Confirmed
Confirmation Methods:SEM-EDS
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Ptasie Gniazda Rocks, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
Data Identifiers
Mindat Occurrence Record ID:853742
Long-form Identifier:1:3:853742:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.5km (0.9 miles) ⓘKarkonosze IG-1 borehole, Jakuszyce, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
1.7km (1.0 miles) ⓘSkalna Brama pegmatite, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
2.7km (1.7 miles) ⓘSzklarska Poręba Huta granite quarry, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
2.9km (1.8 miles) ⓘZwalisko, Szklarska Poręba, Karkonosze County, Lower Silesian Voivodeship, Poland
3.5km (2.2 miles) ⓘStanisław Quarry, Kopaniec, Gmina Stara Kamienica, Karkonosze County, Lower Silesian Voivodeship, Poland
8.4km (5.2 miles) ⓘMichałowice granite quarry, Piechowice, Karkonosze County, Lower Silesian Voivodeship, Poland
8.5km (5.3 miles) ⓘJizerská louka, Jizerka, Kořenov, Jablonec nad Nisou District, Liberec Region, Czech Republic
11.8km (7.3 miles) ⓘOld leucogranite quarry, Kotlina, Gmina Mirsk, Lwówek Śląski County, Lower Silesian Voivodeship, Poland
12.6km (7.8 miles) ⓘSn mine, Gierczyn, Gmina Mirsk, Lwówek Śląski County, Lower Silesian Voivodeship, Poland
14.1km (8.7 miles) ⓘMica slates quarry, Orłowice, Gmina Mirsk, Lwówek Śląski County, Lower Silesian Voivodeship, Poland
References
Eligiusz Szełęg collection
 
and/or  
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