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Spinel Var Pleonaste

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NST758761

Spinel Var Pleonaste

Description Tabs

Description
Locality: 
Gon Phlogopite Deposit, Aldan, Aldan Shield, Sakha Republic, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 6 × 4 cm
Largest Crystal: 
3.80cm
Description

A 3.8 cm black Spinel var Pleonaste on Diopside. The crystal has a contact on one side.

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