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Olmiite

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VCV150868

Olmiite

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 2.4 × 1.9 cm
Largest Crystal: 
1.30cm
Description

Fine beige wheat sheaf crystals of olmiite, the Mn2+ dominant analogue of poldervaartite.

From the type locality and only found at the Wessels and N'chwaning II and III mines in the Northern Cape Province, South Africa to date.

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...
Vic's Vugh Minerals