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
DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland


03764920017371598486039.jpg
Biotite

DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
01809780017272307422523.jpg
Biotite, etc.

Subtrio pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
06763610017272034808420.jpg
Biotite

DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
01809780017272307422523.jpg
Biotite, etc.

Subtrio pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
06763610017272034808420.jpg
Biotite

DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
00734130017371598495562.jpg
Biotite, etc.

Subtrio pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów 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
Associated Minerals Based on Photo Data:
Muscovite1
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
Data Identifiers
Mindat Occurrence Record ID:702968
Long-form Identifier:1:3:702968:4
GUID (UUID V4):0
Localities for Biotite in this Region
Julianna pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
Lithium pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
Subtrio pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
Nearest other occurrences of Biotite
0.1km (0.0 miles) ⓘJulianna pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland
1.9km (1.2 miles) ⓘGilów talc deposit, Gilów, Gmina Niemcza, Dzierżoniów County, Lower Silesian Voivodeship, Poland
2.6km (1.6 miles) ⓘGilów pegmatite, Gilów, Gmina Niemcza, Dzierżoniów County, Lower Silesian Voivodeship, Poland
3.0km (1.9 miles) ⓘGilów quarry, Gilów, Gmina Niemcza, Dzierżoniów County, Lower Silesian Voivodeship, Poland
3.2km (2.0 miles) ⓘUnnamed gneiss quarry, Dobrocin, Gmina Dzierżoniów, Dzierżoniów County, Lower Silesian Voivodeship, Poland
4.3km (2.7 miles) ⓘKośmin SJENIT S.A. mine, Gumin, Niemcza, Gmina Niemcza, Dzierżoniów County, Lower Silesian Voivodeship, Poland
7.7km (4.8 miles) ⓘStrach Hill quarry, Przerzeczyn-Zdrój, Gmina Niemcza, Dzierżoniów County, Lower Silesian Voivodeship, Poland
8.3km (5.2 miles) ⓘPrzedborowa syenite quarry, Przedborowa, Gmina Stoszowice, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
8.8km (5.5 miles) ⓘMt. Szklana Mine (Szklary pegmatite), Szklary, Gmina Ząbkowice Śląskie, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
12.7km (7.9 miles) ⓘŻelowice quarry, Gmina Kondratowice, Strzelin County, Lower Silesian Voivodeship, Poland
References
SZEŁĘG et al. 2010: Geology of the Julianna pegmatite vein system from the Piława Górna quarry (Dolnośląskie Surowce Skalne S.A.), Sowie Mts Block, SW Poland. Mineralogia - Special Papers, 37.
Dulski, Mateusz, Janeczek, Janusz, Włodyka, Roman (2025) In-Depth Analysis of Complex Multiphase Oxidative Transformations in Iron Sulfides (Pyrrhotite and Pyrite) Within Migmatitic Gneiss. Minerals, 15 (1). doi:10.3390/min15010049
 
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