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Gonnardite Psm Haüyne

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KRM719710

Gonnardite Psm Haüyne

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Description Tabs

Description
Locality: 
Ladjuar Madan, Kokcha Valley, Badakhshan Province, Afghanistan
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 5 × 3 cm
Description

A very good unusual pseudomorph example , well terminated gonnardite replacing blue Hauyne , nice specimen inperson!

Mineral Data
What's on the rock

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

Haüyne

Formula: 
(Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2
Strunz: 
9.FB.10
Hardness: 
5.5 - 6.0
Type Locality: 
Lake Nemi, Alban Hills, Rome Province, Latium, Italy

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