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Stilbite With Chabazite

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QRI785836

Stilbite With Chabazite

Classic Locality

Description Tabs

Description
Locality: 
Miage Glacier, Veny Valley, Monte Bianco, Courmayeur, Aosta Valley, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 6.1 × 3.1 cm
Largest Crystal: 
1.60cm
Weight: 
132.00gr
Description

Candid white radial fans of mother-of-pearlaceous lustre stilbite crystals nicely contrast on the hazel metamorphic matrix of this specimen, associated to a dozen of cream white chabasite cubes. Good lustre and condition for both species.
Zeolites from Mont Blanc are a quite sought-after classic for Alpine classic collectors. This specimen features the representative features that those species display on the locality.
Quite difficult to obtain nowadays.

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

Chabazite

Synonym Of: 

Chabazite-Ca

Formula: 
(Ca,K2,Na2)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 5.0

Chabazite-K

Formula: 
(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0

Chabazite-Mg

Formula: 
(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 0.0

Chabazite-Na

Formula: 
(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0

Chabazite-Sr

Formula: 
Sr2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 4.5

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