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Quartz & Calcite

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BMM957258

Quartz & Calcite

Description Tabs

Description
Locality: 
Piz Beverin, Mathon, Schams, Hinterrhein, Grisons, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10.3 × 9.7 × 5.7 cm
Description

These are quartz crystals which have grown as a group. They show a slightly pale yellow patina with a very good shine through a thin limonite layer. The main crystal reaches a length of 6 cm and is doubly terminated. In addition, two bright transparent calcites have grown on the quartz crystals. On the backside you can also find two bright calcites. The piece is undamaged and crystallized nearly as a floater. A truly beautifull alpine piece!

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