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Analcime On Quartz Psm Baryte & Calcite

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CLB66818

Analcime On Quartz Psm Baryte & Calcite

Pseudomorph

Description Tabs

Description
Locality: 
Crastu Muradu Quarry, Osilo, Sassari Province, Sardinia, Italy
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 6.1 × 2.5 cm
Largest Crystal: 
0.90cm
Description

A  interesting cluster with lustrous analcime crystals up to 0.9 cm on a lawn of micro-quartz crystals, partly replacing bladed baryte and calcite scalenohedrons.

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White

Calcite

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

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