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Andradite With Calcite & Epidote & Actinolite

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BMM716555

Andradite With Calcite & Epidote & Actinolite

Description Tabs

Description
Locality: 
Cala Mines, Cala, Huelva, Andalusia, Spain
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4.4 × 2.7 cm
Description

This piece shows exposed andradite crystals in combination with bright pink colored calcite, pale green epidote and actinolite. The faces of the andradites are highly glossy combined with a fine texture. The bright calcite shows a good contrast to the dark andradites. A very nice and rare piece of a location that is hardly known.

Mineral Data
What's on the rock

Andradite

Formula: 
Ca3Fe3+2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Drammen, Buskerud, Norway

Calcite

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

Epidote

Formula: 
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05a
Crystal System: 
Monoclinic
Hardness: 
6.0
Streak: 
Colorless
Type Locality: 
Bourg d'Oisans, Isère, Rhône-Alpes, France...

Actinolite

Formula: 
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Crystal System: 
Monoclinic - Prismatic
Hardness: 
5.0 - 6.0
Streak: 
White
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