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Actinolite With Galena

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GND30721

Actinolite With Galena

Classic Locality

Description Tabs

Description
Locality: 
North Mine, Broken Hill, New South Wales, Australia
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 3.8 × 4.5 cm
Description

A really hard to get species for the Broken Hill collector. This specimen dark green fibres of actinolite (needs positive I.D.) together with stressed galena in a typical garnet sandstone matrix.<p> Some more blocky patches, reminidcent of hornblende) occur at the base of the specimen.

Mineral Data
What's on the rock

Actinolite

Formula: 
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Crystal System: 
Monoclinic - Prismatic
Hardness: 
5.0 - 6.0
Streak: 
White

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey
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