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Chrome-Tremolite In Calcite

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PDM748192

Chrome-Tremolite In Calcite

Classic Locality

Description Tabs

Description
Locality: 
Outokumpu, North Karelia, Finland
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
13.7 × 8.5 × 5.5 cm
Largest Crystal: 
9.00cm
Description

Fibrous green prismatic crystals of tremolite with an intense emerald green colour because it is rich in chrome. The matrix is composed of white calcite and green microcrystalline uvarovites.

This specimen was recovered before 1980 from a shipment in the port of Antwerp by Jozef Verbist, who was the CEO of the CMB (Compagnie Maritime Belge).

Mineral Data
What's on the rock

Chrome-Tremolite

Variety Of: 

Tremolite

Formula: 
☐{Ca2}{Mg5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0
Hardness: 
0.0

Calcite

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

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