Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Tourmaline from
Chlum Hill, Sepekov, Písek District, South Bohemian Region, Czech Republic


07873720017375505363321.jpg
Dravite

Chlum Hill, Sepekov, Písek District, South Bohemian Region, Czech Republic
07873720017375505363321.jpg
Dravite

Chlum Hill, Sepekov, Písek District, South Bohemian Region, Czech Republic
05114680017375505378675.jpg
Dravite

Chlum Hill, Sepekov, Písek District, South Bohemian Region, Czech Republic
Locality type:Hill
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Chlum Hill, Sepekov, Písek District, South Bohemian Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:648015
Long-form Identifier:1:3:648015:8
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
15.4km (9.5 miles) ⓘVepice quarry, Vepice, Kovářov, Písek District, South Bohemian Region, Czech Republic
20.0km (12.5 miles) ⓘU údražského obrázku quarry, Údraž, Albrechtice nad Vltavou, Písek District, South Bohemian Region, Czech Republic
21.9km (13.6 miles) ⓘKamenné doly quarry, Písek, Písek District, South Bohemian Region, Czech Republic
22.1km (13.7 miles) ⓘU obrázku quarry (Obrázek I quarry), Písek District, South Bohemian Region, Czech Republic
40.0km (24.8 miles) ⓘTrucbába – Valcha, Pacov, Pelhřimov District, Vysočina Region, Czech Republic
54.5km (33.9 miles) ⓘNová Ves pegmatite, Nová Ves, Český Krumlov District, South Bohemian Region, Czech Republic
61.4km (38.2 miles) ⓘZrcadlová Huť quarry, Chvalšiny, Český Krumlov District, South Bohemian Region, Czech Republic
61.8km (38.4 miles) ⓘBřezina pegmatite, Moldanubian Zone pegmatites, Vlastějovice, Kutná Hora District, Central Bohemian Region, Czech Republic
62.5km (38.8 miles) ⓘPegmatite occurrences, Dolní Svince, Dolní Třebonín, Český Krumlov District, South Bohemian Region, Czech Republic
62.6km (38.9 miles) ⓘNosatá skála pegmatite, Moldanubian Zone pegmatites, Vlastějovice, Kutná Hora District, Central Bohemian Region, Czech Republic
References
Fiala, J., Losert, J.: Nález korundu, cordieritu, granátu, sillimanitu a turmlínu v hercynitovcích na Chlumu u Sepekova. Časopis pro mineralogii a geologii, 1976, roč. 21, č. 3, s. 326.
 
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