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Natrolite & Gonnardite

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CSW1091373

Description Tabs

Description
Locality: 
Little Deerpark Quarry, Glenarm, County Antrim, Northern Ireland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 4 × 4 cm
Weight: 
134.00gr
Description

Basalt matrix with an unusually dense coverage of spherical clusters of colourless natrolite crystals. The natrolite clusters have cores of white gonnardite, best seen when the specimen is wet. Gonnardite is one of the rarer zeolite minerals from the Antrim Basalt Formation. T2

Mineral Data
What's on the rock

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

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

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Shipping Information

Postage Area Price
UK - Royal Mail 1st Class
$6
Europe - Tracked/ Insured
$12
Rest of World - Tracked/ Insured
$16
View sellers shipping policy

Postage will be by 1st Class Royal Mail post within UK and by Tracked Insured Courier for international sales.

Simply let me know if you would like to accumulate orders and 'keep a box open' to benefit from combined postage savings.

If you have any queries feel free to drop me an email.

Many thanks, Trevor

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

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. 

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