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Spinel & Calcite

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ESM515812

Spinel & Calcite

Description Tabs

Description
Locality: 
Amboasary Sud, Anosy, Madagascar
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.2 × 5 × 2.9 cm
Description

Black spinell crystals perched on a calcite matrix

Mineral Data
What's on the rock

Spinel

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White