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Ferrierite-Mg Heulandite-Ca & Calcite

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SMM639034

Ferrierite-Mg Heulandite-Ca & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Ugas Quarry, Monastir, South Sardinia Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 2 × 3 cm
Description

A very nice sample with some hemispherical groups of bright orange crystals of ferrierite-Mg and some calcite crystals. In the middle of the sample there are some nice groups of heulandite tabular crystals that measure about one and a half centimeters.

Boxed with Label
Mineral Data
What's on the rock

Ferrierite-Mg

Formula: 
(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72]·18H2O
Strunz: 
9.GD.50
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Streak: 
White
Type Locality: 
Kamloops Lake, Kamloops Mining Division, British Columbia, Canada

Heulandite-Ca

Formula: 
(Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Strathclyde (Dunbartonshire), Scotland, UK

Calcite

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

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