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Andesine

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PJM170511

Andesine

Description Tabs

Description
Locality: 
Portland Harbour Trust Quarry, Cape Sir William Grant, Portland, Glenelg Shire, Victoria, Australia
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 3.5 × 2.8 cm
Description

The Portland Harbour Trust Quarry has produced some the worlds finest andesine crystals and this specimen with bladed crystals of andesine to 2.5 cm must be up there with some of the finest. Associated minerlas included augite and ilmenite

Mineral Data
What's on the rock

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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