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Quartz & Calcite

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RBR742349

Quartz & Calcite

Description Tabs

Description
Locality: 
Cavrein Alp, Gronda da Cavrein Valley, Vorderrhein Valley, Grischun, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 5.5 × 5 cm
Description

I was looking for special mineral specimens from Switzerland lately. That's why I found this unusual item. It was found by a swiss collector in 2017. The specimen is in very good condition and shows some really nice quartz-crystals at the base. The quartz is high lustrous and clear. But the highlight is the calcite right in the middle. It is a flat crystal with an interesting structure and free standing. 

Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Calcite

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