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Tacharanite & Gonnardite

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CSL500933

Tacharanite & Gonnardite

Rare Mineral

Description Tabs

Description
Locality: 
Uzsa, Tapolca, Veszprém County, Hungary
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 2.5 × 1.6 cm
Description

Rare Ca-Al-silicate mineral as white "snow-balls" associating with white radiating aggregates of gonnardite, on basalt matrix.

Mineral Data
What's on the rock

Tacharanite

Formula: 
Ca12Al2Si18O51·18H2O
Strunz: 
9.HA.75
Crystal System: 
Monoclinic
Hardness: 
5.0
Colour: 
White
Type Locality: 
Portree, Trotternish, Isle of Skye, North West Highlands (Inverness-shire), Scotland, UK

Gonnardite

Formula: 
(Na,Ca)2(Si,Al)5O10·3H2O
Strunz: 
9.GA.05
Hardness: 
4.0 - 5.0
Type Locality: 
La Chaux de Bergonne, Gignat, Saint-Germain-Lembron, Puy-de-Dôme, Auvergne, France
Loranth Minerals

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