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Smoky Quartz & Calcite

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MGR146634

Smoky Quartz & Calcite

Description Tabs

Description
Locality: 
Giuv Valley, Tujetsch, Surselva Region, Grisons, Switzerland
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 8.4 × 5.9 cm
Description

Superb sample of smoky quartz in best quality. The crystals show very dark brown colour, fine clearity, they are sharp terminated and show highest lustre. Very rare is the assemble with blades of calcite in the middle. Aesthetic assemble and very showy in variouse positions. No significent damages. Etched at the lower backside.

Mineral Data
What's on the rock

Smoky Quartz

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
SiO2
Hardness: 
0.0

Calcite

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