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Demantoid With Asbestos

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QRI866533

Demantoid With Asbestos

Former collection Kasper (CH)
Gem Crystal

Description Tabs

Description
Locality: 
Geisspfad, Binn, Goms, Valais, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 4.6 × 3.5 cm
Largest Crystal: 
0.20cm
Weight: 
72.00gr
Description

Rich miniature of metaserpentinite hosting a dozen of dark green-brownish andradite crystals, var. demantoid. Crystals are textbook and slightly rounded at the edges, very dark for the species and protrude from the asbestos fibers which partly fill the mineralized surface.

Very unusual to spot at mineral shows, even in Switzerland. The specific specimen comes from the Kasper collection (CH) which dates back to the 70s. 

Pasted Label
Mineral Data
What's on the rock

Demantoid

Variety Of: 

Andradite

Formula: 
Ca3Fe3+2(SiO4)3
Strunz: 
9.AD.25
Hardness: 
6.5 - 7.0

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