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Spinel Var Pleonaste & Fassaite

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SLN535308

Spinel Var Pleonaste & Fassaite

Description Tabs

Description
Locality: 
Toal de la Foia, Monzoni Mountains, Trento Province, Trentino-Alto Adige, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
3.7 × 10.5 × 8.3 cm
Weight: 
268.00gr
Description

Nice specimen from Fassa Valley with a lot of rare spinel var pleonaste in dark blue-green almost black crystals of good brightness in associations with yellow-green fassaite. Crystals are present in different sides of the piece as shown by photos

Mineral Data
What's on the rock

Spinel

Formula: 
MgAl2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
7.5 - 8.0

Pleonaste

Variety Of: 

Spinel

Formula: 
MgAl2O4
Strunz: 
4.BB.05
Hardness: 
7.5 - 8.0
Hardness: 
0.0

Fassaite

Variety Of: 

Augite

Formula: 
(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Strunz: 
9.DA.15
Hardness: 
5.5 - 6.0
Hardness: 
0.0

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