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Gmelinite Na & Marcasite

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BCK649899

Gmelinite Na & Marcasite

Classic Locality

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 5.6 × 1 cm
Description

You are bidding on a large sample with fantastic crystals of gmelinite-Na scattered all over the matrix with marcasite, pyrite, purple fluorite cubes and calcite. There seems to be two seperate generations of gmelinite here, with large groups of crystals forming early and then a rich smattering of smaller crystals later. So much to look at on this rich sample! Would produce some amazing photomicrographs from someone with better equipment. WAH material. 

Mineral Data
What's on the rock

Gmelinite

Synonym Of: 

Gmelinite-Ca

Formula: 
(Ca,Na2)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Hardness: 
4.5

Gmelinite-K

Formula: 
(K2,Na2,Ca)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Hardness: 
4.5

Gmelinite-Na

Formula: 
(Na2,Ca)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Hardness: 
4.5
Group Parent: 
Zeolite Group

Marcasite

Formula: 
FeS2
Strunz: 
2.EB.10a
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 6.5

Seller Information

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