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Zavaritskite & Russellite

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SKY601229

Zavaritskite & Russellite

Classic Locality

Description Tabs

Description
Locality: 
Horní Slavkov, Sokolov, Karlovy Vary Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 1 cm
Description

Black crystals of the very rare mineral zavaritskite (BiOF) associated to yellow russellite (Bi2WO6), so two rare bismuth minerals in a single specimen.

Zavaritskite in appreciable crystals (first photo) is very rarely seen in the mineral market.

Mineral Data
What's on the rock

Zavaritskite

Formula: 
(BiO)F
Strunz: 
3.DC.25
Crystal System: 
Tetragonal
Hardness: 
2.0 - 2.5
Colour: 
Grey
Type Locality: 
Sherlova Gora (Sherlovaya Gora), Adun-Cholon Range, Nerchinsk Gem mines, Nerchinsk (Nertschinsk), Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia...

Russellite

Formula: 
Bi2WO6
Strunz: 
4.DE.15
Crystal System: 
Tetragonal
Hardness: 
3.5
Type Locality: 
Castle-an-Dinas Mine, Castle-an-Dinas, St Columb Major, St Austell District, Cornwall, England, UK

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