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Clinohumite On Calcite

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BMM726230

Clinohumite On Calcite

Description Tabs

Description
Locality: 
Ladjuar Madan, Kokcha Valley, Badakhshan Province, Afghanistan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 5 × 4.7 cm
Description

Look at this great speciman: perfectly terminated, deep red clinohumite crystals on bright calcite matrix. The main crystal measures exactly 1 cm in size. It is exposed on the calcite crystals and attracts attention. The faces are shiny and smooth, slightly structured on one surface. Rare piece that is rarely offered!

Mineral Data
What's on the rock

Clinohumite

Formula: 
Mg9(SiO4)4F2
Strunz: 
9.AF.55
Hardness: 
6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Calcite

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