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Chromian Diopside On Graphite

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PDM589964

Chromian Diopside On Graphite

Gem Crystal

Description Tabs

Description
Locality: 
Merelani Hills, Arusha Region, Tanzania (United Republic)
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1.3 × 1.1 cm
Description

Group of very well defined prismatic crystals of diopside (variety chromian), showing {100} and {110}, striated lengthwise, with steep terminations that show growth steps. They have incredible vitreous lustre and good transparency. We enhance here the deep green colour of this specimen which is uncommon. The group is on a small matrix of graphite crystals.

Found in 2010 it is from my own collection.

Mineral Data
What's on the rock

Chromian Diopside

Variety Of: 

Diopside

Formula: 
CaMgSi2O6
Strunz: 
9.DA.15
Hardness: 
5.5 - 6.5
Formula: 
(Ca,Cr)MgSi2O6
Hardness: 
0.0
Colour: 
Green

Graphite

Formula: 
C
Strunz: 
1.CB.05a
Crystal System: 
Hexagonal
Hardness: 
1.0 - 2.0

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