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Brochantite & Malachite On Native Copper

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PJM82331

Brochantite & Malachite On Native Copper

Ex J & S Mommers Collection

Description Tabs

Description
Locality: 
Block 10, Broken Hill, Yancowinna County, New South Wales, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 3 × 1.3 cm
Description

An old time native copper from Block 10, finely crystalised with elongated spinel twinning forming a tightly packed forest of copper crystals. This group is further enhaced by the copper being partially replaced by dark red cuprite and then coated with light green malachite and dark forest green brochantite.

A classic specimen originally from the Jose Rees Collection  (Sydney)

Mineral Data
What's on the rock

Brochantite

Formula: 
Cu4(SO4)(OH)6
Strunz: 
7.BB.25
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0
Type Locality: 
Mednorudyanskoye Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia...

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

Copper

Formula: 
Cu
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0
Earthstones Australia

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