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Hilairite Natrolite & Gonnardite

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PAV992979

Hilairite Natrolite & Gonnardite

Classic Locality

Description Tabs

Description
Locality: 
Malerød quarry, Tveidalen, Larvik, Vestfold og Telemark, Norway
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1.8 × 1.3 cm
Description

Fantastic combo of gemmy brownish, transparent crystals of hilairite covered by minute gonnardite crystals on prismatic natrolite crystals.

Acquired: 
Boxed with Label
Mineral Data
What's on the rock

Hilairite

Formula: 
Na2Zr[SiO3]3·3H2O
Strunz: 
9.DM.10
Hardness: 
4.5
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Gonnardite

Formula: 
(Na,Ca)2(Si,Al)5O10·3H2O
Strunz: 
9.GA.05
Hardness: 
4.0 - 5.0
Type Locality: 
La Chaux de Bergonne, Gignat, Saint-Germain-Lembron, Puy-de-Dôme, Auvergne, France