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Olmiite

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Olmiite

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Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.2 × 5 × 2.8 cm
Weight: 
65.41gr
Description

Olmiite has formed intertgrown balls of translucent, orange-brown balls of olmiite. On this specimen the olmiite formed a botryoidal outcrop on calcite showing good colour and a reflective lustre on translucent material that is inclined towards gemminess. One of the olmiite balls is contacted.

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...

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