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Cryolite Gmelinite-Na & Harmotome

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CFL828115

Cryolite Gmelinite-Na & Harmotome

Fluorescent

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.4 × 2 cm
Description

Very nice specimen of gemmy cryolite crystals associated with gmelinite-Na, harmotome and siderite.  Collected by Gilles Haineault.

Mineral Data
What's on the rock

Cryolite

Formula: 
Na3[AlF6]
Strunz: 
3.CB.15
Crystal System: 
Monoclinic
Hardness: 
2.5
Streak: 
White
Type Locality: 
Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland

Gmelinite-Na

Formula: 
(Na2,Ca)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Crystal System: 
Hexagonal
Hardness: 
4.5
Type Locality: 
Nero Mt., San Pietro, Montecchio Maggiore, Vicenza Province, Veneto, Italy

Harmotome

Formula: 
(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] ·12H2O
Strunz: 
9.GC.10
Crystal System: 
Monoclinic
Hardness: 
4.0 - 5.0
Streak: 
White
Type Locality: 
St Andreasberg, St Andreasberg District, Harz, Lower Saxony, Germany

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