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Koechlinite & Russellite

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MNR187850

Koechlinite & Russellite

Description Tabs

Description
Locality: 
Krásno, Sokolov District, Karlovy Vary Region, Czech Republic
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 2.4 × 2 cm
Description

Koechlinite is white to beige powder (mostly covering top of the specimen and Russelite is yellow crystalline as seen on the picture s 3, 4 and 6. Both minerals are bismuth oxides.

Mineral Data
What's on the rock

Koechlinite

Formula: 
Bi2MoO6
Strunz: 
4.DE.15
Hardness: 
0.0
Type Locality: 
Daniel Mine (St. Daniel Mine), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

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