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Stilbite

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QRI828585

Stilbite

Former collection Christian Mavris
Classic Locality

Description Tabs

Description
Locality: 
Miage Glacier, Veny Valley, Monte Bianco, Courmayeur, Aosta Valley, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 3.6 × 3.4 cm
Largest Crystal: 
0.50cm
Weight: 
62.00gr
Description

A group of stilbite bowties populate this metamorphic matrix specimen. Stilbite shows a good quality, rather clean of damage, with moderate lustre and textbook shape.

A cute little specimen, self-collected in 2004 when I had retrieved the permits to collect there.

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

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