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Analcime Calcite & Opal

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CFL1087691

Analcime Calcite & Opal

Description Tabs

Description
Locality: 
McKay Head, Cumberland County, Nova Scotia, Canada
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 4.8 × 2.2 cm
Description

Uncommon specimen of gemmy analcime crystals associated with calcite and opal.  Ex-Morin-Veillet Collection.

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

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Streak: 
White

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