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Gmelinite On Analcime

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PCZ161393

Gmelinite On Analcime

Type Locality

Description Tabs

Description
Locality: 
Little Deerpark Quarry, Glenarm, County Antrim, Northern Ireland, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 6 × 6 cm
Description

Continuing with specimens from my best ever find at the type locality. The quality of the specimens is still very high however the area of crystallisation and the size of the gmelinite crystals is starting to decrease as I move through my stock. This specimen has sharp, reflective gmelinite crystals aesthetically placed on water clear analcime crystals. The gmelinite crystals are well formed and of good colour. The area of crystallisation is 4 x 2.5 cm. Lovely specimen. The matrix has been trimmed by saw to reduce it for aesthetic purposes.

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

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
Peter Crozier Minerals