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Analcime With Calcite

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QRI818275

Analcime With Calcite

Classic Locality

Description Tabs

Description
Locality: 
Cattignano Quarry, San Giovanni Ilarione, Verona Province, Veneto, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 4.5 × 5 cm
Largest Crystal: 
0.50cm
Weight: 
177.00gr
Description

Rich geode with glassy, very lustrous analcime crystals, associated to white botryiodal calcite. Both specie lie on a bed of what appears to be vermiculite/tobermorite, typical for this paragenesis, and that also contributes to an excellent color contrast.

Pretty good and sought-after for the area, nowadays rather scarce material to obtain in this quality.

Mineral Data
What's on the rock

Analcime

Formula: 
Na2(Al2Si4O12)·2H2O
Strunz: 
9.GB.05
Crystal System: 
Triclinic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Cyclopean Islands, Acitrezza (Aci Trezza), Etna Volcanic Complex, Catania Province, Sicily, Italy

Calcite

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

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