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Olmiite On Calcite

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WND811729

Olmiite On Calcite

Rare Mineral, Type Locality
Classic Locality

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 3.7 × 3.4 cm
Description

Spheroidal clusters of intense meat-coloured rare olmiite accompanied by sparkly, white calcite from the typelocality. The surface of the olmiite spheres is glistening because they consist of numerous of small and lustrous crystals. In any case this is a fine, aesthetic andcontrastful specimen in splendid condition.

Mineral Data
What's on the rock

Olmiite

Formula: 
CaMn2+[SiO3(OH)](OH)
Strunz: 
9.AF.90
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa...

Calcite

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

Seller Information

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