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Gismondine

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QRI839714

Gismondine

Former collection Christian Mavris
Classic Locality

Description Tabs

Description
Locality: 
Zebrù Valley, Valfurva, Sondrio Province, Lombardy, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.1 × 4.5 × 2.6 cm
Largest Crystal: 
0.30cm
Weight: 
65.00gr
Description

Rich drusy of rare gismondine partly covering the green matrix. Some sharp, well-defined gismondine octahedrons stand out of the drusy, which hosts numerous rather crude crystals.

A good specimen from the area, once an Alpine classic from the Adamello area. Rather scarce material nowadays.

Mineral Data
What's on the rock

Gismondine

Synonym Of: 

Gismondine-Ca

Formula: 
CaAl2Si2O8·4H2O
Strunz: 
9.GC.05
Hardness: 
0.0
Group Parent: 
Zeolite Group

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