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Olmiite

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WND836145

Olmiite

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: 
Thumbnail (1-3cm)
Size: 
2.6 × 2.3 × 1.2 cm
Description

Despite this is "just a thumnail", it is a really good one. Two intergrown meat-coloured, with a hint of orange, clusters of mirror bright and sharp Olmiite centered on a sod of glistening Calcite. The crystals are lucent to transparent and almost pristine. The surface of the Olmiite features a interesting, multistepped pattern, what is typical for this kind of  the species. A super aesthetic and exceeding well balanced thumbnail 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...
Wendel Minerals

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