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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: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3 × 2.5 cm
Description

This is not only the most uncommon color for olmiite,but also a huge crystal!If you pay attention, only the reddish balls are bigger than that and they are not considered crystals.The crystals are unusually sharp,lustrous and under close inspection one can see phantoms!Both are complete,undamaged,doubly terminated and on matrix with gemmy calcite crystals!Superb miniature!

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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