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Analcime & Albite & Siderite

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CFL755028

Analcime & Albite & Siderite

Pseudomorph

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 3.5 × 2 cm
Description

Gorgeous pseudomorph specimen of analcime, albite and siderite after natrolite, associated with very strong fluorescent yellowish quartz (?; as indicated by the old label) crystals.  However, these quartz (?) crystals are probably cryolite.  Cryolite is rare at this locality.  Numerous very well formed small analcime crystals are gemmy.  There are also microcrystals of two unidentified species.  Collected in 1998.

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

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

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