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Offretite

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CHP1060361

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Description
Locality: 
Lake Arno, Alta Val Saviore, Adamello Massif, Brescia Province, Lombardy, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.9 × 1 cm
Description

specimen with many beautiful white/colourless striped crystals of offretite on matrix.

c. 8576

Mineral Data
What's on the rock

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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