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Kutnohorite & Groutite

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RAF535298

Kutnohorite & Groutite

Gem Crystal

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 5.2 × 6.7 cm
Largest Crystal: 
4.00cm
Weight: 
147.00gr
Description

Beautiful kutnahorite specimen from N'Chwaning II. Northern Cape. A rare form... Just a gem of a specimen...

Mineral Data
What's on the rock

Kutnohorite

Formula: 
Ca(Mn,Mg,Fe)(CO3)2
Strunz: 
5.AB.10
Hardness: 
3.5 - 4.0
Type Locality: 
Poličany, Kutná Hora (Kuttenberg), Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

Groutite

Formula: 
Mn3+O(OH)
Strunz: 
4.FD.10
Hardness: 
3.5 - 4.0
Type Locality: 
Sagamore Mangan No. 2 pit, Ironton, Cuyuna North Range, Crow Wing Co., Minnesota, USA