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Montmorillonite & Calcite

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TPX889551

Montmorillonite & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Can Súria Quarry, Maçanet de la Selva, Girona, Catalonia, Spain
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4.3 × 4.2 cm
Weight: 
111.00gr
Description

Very nice group of calcite and montmorillonite crystals filling vacuoles of this effusive rock.

Mineral Data
What's on the rock

Montmorillonite

Formula: 
(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2·nH2O
Strunz: 
9.EC.40
Hardness: 
1.0 - 2.0
Streak: 
white
Type Locality: 
Montmorillon, Vienne, Poitou-Charentes, France

Calcite

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

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