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Andesine

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PJM79985

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: 
3.2 × 1.7 × 1.2 cm
Description

The Harbour Trust Quarry at portland has arguably produced the worlds finest andesine crystals. This geometrically stunning andesine crystal is an examlpe why, looking more like a modernist sculpture rather than a natural crystal,the stepped and  hoppered faces and flattened form are  elegant in their simplicity

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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