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Chabazite-Ca & Offretite

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LAJ792582

Chabazite-Ca & Offretite

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Description
Locality: 
Lake Arno, Alta Val Saviore, Adamello Massif, Brescia Province, Lombardy, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
1.5 × 10 × 5 cm
Largest Crystal: 
0.50cm
Weight: 
83.00gr
Description

Chabazite-Ca, offretite

Semitransparent rhombohedral crystals of chabazite-Ca on a carpet of offretite crystals

crystal on matrix

 

Mineral Data
What's on the rock

Chabazite-Ca

Formula: 
(Ca,K2,Na2)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 5.0
Streak: 
White
Type Locality: 
Colle del Lares, San Nicolò Valley, Buffaure Group, Fassa Valley, Trento Province, Trentino-Alto Adige, Italy

Offretite

Formula: 
KCaMgAl5Si13O36·16H2O or near
Strunz: 
9.GD.25
Hardness: 
4.0 - 4.5
Type Locality: 
Mont Semiol (Mont Semiouse; Mont Simiouse), Châtelneuf, Saint-Georges-en-Couzan, Loire, Rhône-Alpes, France

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