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Erionite-Ca

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BSM665864

Erionite-Ca

ex Dr.Stephen Moreton specimen

Description Tabs

Description
Locality: 
Upper Hightown Road Quarry, Glengormley, County Antrim, Northern Ireland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.6 × 5.1 × 2.6 cm
Description

Dark grey amygdaloidal basalt with numerous amygdales some of which are lined with radiating fibrous crystals of a golden brown colour. Additionally some of the former gas bubbles reveal minute tapering crystals of aragonite growing on the erionite -Ca.

Previous labels supplied (not photographed)
Mineral Data
What's on the rock

Erionite-Ca

Formula: 
(Ca,K2,Na2)2[Al4Si14O36]·15H2O
Strunz: 
9.GD.20
Hardness: 
3.5 - 4.0
Colour: 
White
Streak: 
White
Type Locality: 
Maze (Mazé), Niigata City, Niigata Prefecture, Chubu Region, Honshu Island, Japan

Seller Information

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