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Tourmaline Var Schorl & Stilbite

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CSW198494

Tourmaline Var Schorl & Stilbite

Description Tabs

Description
Locality: 
Mourne Mountain, County Down, Northern Ireland, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 7.2 × 3.2 cm
Description

Granite matrix with vugs containing clusters of small white to golden brown, flat-topped stilbite crystals with jet black prismatic schorl crystals. Nice orthoclase and smoky quartz crystals are also present.

Mineral Data
What's on the rock

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White
Causeway Minerals

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 minus postage. If you are simply unhappy with your specimen just email me within 1 week of receiving it. Return it to me and I will issue an immediate refund of the original transaction value including postage.

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