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Calcite & Pyrolusite

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MGR787720

Calcite & Pyrolusite

Description Tabs

Description
Locality: 
Daye County, Huangshi, Hubei Province, China (Peoples Republic)
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5.4 × 4.4 cm
Description

This is very attractive material! The specimen  consits of numerous inter-grown crystals - all of them razor-sharp terminated and on highest luster. The crystals are very light, partly water-clear, but they also show nearly black pyrolusite phantoms, which give a spectacular contrast to this very aesthetic assemble.

Mineral Data
What's on the rock

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Pyrolusite

Formula: 
MnO2
Strunz: 
4.DB.05
Hardness: 
2.0 - 6.5