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Augite On Andesine

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PJM79139

Augite On Andesine

Ex J & S Mommers Collection

Description Tabs

Description
Locality: 
Portland Harbour Trust Quarry, Cape Sir William Grant, Portland, Glenelg Shire, Victoria, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.5 × 3.3 × 2 cm
Largest Crystal: 
2.80cm
Description

A hollow black augite crystal measuring 2.8cm on an matrix of andesine crystals, collected at the Portland Harbour Trust Quarry in late 1983

 

Mineral Data
What's on the rock

Augite

Formula: 
(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Strunz: 
9.DA.15
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0

Andesine

Variety Of: 

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Formula: 
(Na,Ca)[Al(Si,Al)Si2O8]
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Earthstones Australia

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