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Olmiite Calcite & Xonotlite

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VCV170397

Olmiite Calcite & Xonotlite

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.7 × 5.3 × 3 cm
Largest Crystal: 
1.30cm
Description

A fascinating specimen with perfect lustrous peach coloured olmiite crystals on sparkling white calcite together with even whiter small xonotlite balls.

An exceptional olmiite crystals for the species.

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

Xonotlite

Formula: 
Ca6(Si6O17)(OH)2
Strunz: 
9.DG.35
Crystal System: 
Monoclinic
Hardness: 
6.5
Type Locality: 
Tetela de Xonotla, Puebla, Mexico
Vic's Vugh Minerals