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Garronite-Ca

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PAV858668

Garronite-Ca

New Discovery

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Description
Locality: 
Fajã Grande, São Roque do Faial, Santana, Madeira Islands, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 1.9 × 1.7 cm
Description

Group of nice garrnite-Ca crystals associated to natrolite clusters.

First and only locality in Portugal for the species.

Collected: 
2020
Boxed with Label
Mineral Data
What's on the rock

Garronite-Ca

Formula: 
Na2Ca5Al12Si20O64·27H2O
Group Parent: 
Zeolite Group
Strunz: 
9.GC.05
Crystal System: 
Tetragonal
Hardness: 
4.0 - 5.0
Colour: 
White
Type Locality: 
Glenariff Valley, Garron Plateau, Co. Antrim, Northern Ireland, UK