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Bultfonteinite & Olmiite

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CAM211803

Bultfonteinite & Olmiite

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 6 × 2.5 cm
Description

A very rich coverage of brownish blocky olmiite crystals up to 4 mm and silky white acicular bultfonteinite crystals on matrix. An excellent and showy specimen.

Mineral Data
What's on the rock

Bultfonteinite

Formula: 
Ca2(HSiO4)F·H2O
Strunz: 
9.AG.80
Hardness: 
4.5
Streak: 
white
Type Locality: 
Bultfontein, Lejweleputswa District, Free State Province, South Africa

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...
Cartils Minerals

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