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Gmelinite With Natrolite

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PCZ144353

Gmelinite With Natrolite

Description Tabs

Description
Locality: 
Brown's Bay, Islandmagee, County Antrim, Northern Ireland, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 7.5 × 3 cm
Description

Numerous vugs and areas of flesh coloured gmelinite crystals, up to 3.5 x 2cm in area, on both sides of the basalt matrix. Some of these also contain stocky natrolite crystals. A representitive specimen from a less common locality. ‘Clear-out Minerals’ is having its biggest clear-out yet as the starting price for everything in this auction is just $3 including specimens up to large cabinet size, and a number of type localities. A great chance to combine postage and collect a good suite of zeolites and associated species from an area famed for its minerals.

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

Natrolite

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