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Calcite On Amethyst

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Calcite On Amethyst

Description Tabs

Description
Locality: 
Geevor Mine, Cornwall, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 3.5 × 3.5 cm
Description

A 2 cm barrel shaped calcite crystal with stepped growth lines sitting on crystalline amethystine quartz with heamatite inclusions.

Pretty specimen from The Coronation Lode, Geevor Mine.

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