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Amethyst & Calcite

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MGR970387

Amethyst & Calcite

Description Tabs

Description
Locality: 
Minas Gerais, Minas Gerais, Brazil
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
15.2 × 13.5 × 10.1 cm
Description

Large specimen from Brazil consisting of dozens of well formed and super lustrous amethyst crystals which have partially a coating of pale calcite crystals.

Mineral Data
What's on the rock

Amethyst

Variety Of: 

Quartz

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

Calcite

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