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Quartz On Manganite

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PDM741856

Quartz On Manganite

Description Tabs

Description
Locality: 
NChwaning I Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5.6 × 2 cm
Description

Uncommon specimen of crystallized manganite with the surface richly covered by lustrous translucent quartz with a light blue tint. Some black manganite crystals are visible at the surface between quartz. Undamaged!.

Acquired in the period 1978-85. Ex. H van Dennebroek.

Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Manganite

Formula: 
Mn3+O(OH)
Strunz: 
4.FD.15
Hardness: 
4.0
Type Locality: 
Manganese deposit, Ilfeld, Nordhausen, Harz, Thuringia, Germany

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