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Vishnevite & Gonnardite

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CSW827422

Vishnevite & Gonnardite

Collected by John & Robert Lawson
Rare Mineral

Description Tabs

Description
Locality: 
Allt a'Mhuillin Quarry, Loch Borralan, Highland, Scotland, United Kingdom
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.5 × 8.5 × 3.5 cm
Weight: 
236.00gr
Description

A fine cabinet sized specimen of light blue vishnevite in matrix with white gonnardite. Vishnevite is a rare member of the Feldspathoid group and is associated with alkali igneous intrusions, as at this locality. LC

Mineral Data
What's on the rock

Vishnevite

Formula: 
(Na,K)8(Al6Si6O24)(SO4,CO3)·2H2O
Strunz: 
9.FB.05
Hardness: 
5.0 - 6.0
Streak: 
white
Type Locality: 
Kurochkin Log, Vishnevye Mts (Vishnyovye; Cherry), Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

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

Seller Information

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Thank you for viewing my auctions. It goes without saying that maintaining high standards in both specimen quality and customer service are extremely important to me. If for any reason you are not happy with any aspect of your transaction then please let me know as soon as possible, ideally within 1 week of receiving your specimen. I will happily do all in my power to resolve the situation to your satisfaction. If your specimen is damaged upon delivery simply send me some photos to verify this and I'll provide you with a full refund or a replacement specimen, whichever you prefer.