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Magnesiocoulsonite Tremolite & Calcite

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ESM571348

Magnesiocoulsonite Tremolite & Calcite

Type Locality

Description Tabs

Description
Locality: 
Slyudyanka, Lake Baikal, Irkutsk Oblast, Russian Federation
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 2.2 × 1 cm
Description

Black grains of magnesiocoulsonite in calcite and tremolite

Mineral Data
What's on the rock

Magnesiocoulsonite

Formula: 
MgV2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
6.5
Colour: 
Black
Streak: 
Black
Type Locality: 
Pereval Marble Quarry, Slyudyanka (Sludyanka), Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia...

Tremolite

Formula: 
☐{Ca2}{Mg5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0
Streak: 
White
Type Locality: 
Campolungo, Piumogna Valley, Leventina, Ticino (Tessin), Switzerland

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White