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Stilbite

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GND86324

Stilbite

Collected Easter 2011
Classic Locality

Description Tabs

Description
Locality: 
Arkaroola Region, Flinders Ranges, South Australia, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 4.5 × 3.6 cm
Description

This specimen was one of a few really nice pieces to be found at this favourite outback locality this year. Beautiful radiating & terminated orange stilbte crystals cover the front of this specimen and are associated with fibrous green actinolite.

The volcanic rock these minerals have formed in is around 800m.y old.

Mineral Data
What's on the rock

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White
Gondwana Minerals