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Calcite On Amethyst

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CR196273

Calcite On Amethyst

Description Tabs

Description
Locality: 
Guanajuato, Guanajuato Municipality, Guanajuato, Mexico
Size Range: 
Cabinet (10-18 cm)
Size: 
10.5 × 6.5 × 4 cm
Description

Large white calcite crystals on a bed of very pale amethyst crystals from Alex Franz collection.

With old label.

Mineral Data
What's on the rock

Calcite

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

Amethyst

Variety Of: 

Quartz

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