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Alstonite Pyrite & Calcite

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CSW1081152

Alstonite Pyrite & Calcite

Type Locality

Description Tabs

Description
Locality: 
Brownley Hill Mine, Nenthead, Cumbria, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.1 × 2.2 × 1.2 cm
Description

Pyrite crystals coated in calcite crystals with pointed alstonite crystals from the species Type Locality - unusually one group of crystals are double-terminated. A2

Mineral Data
What's on the rock

Alstonite

Formula: 
BaCa(CO3)2
Strunz: 
5.AB.35
Crystal System: 
Triclinic
Hardness: 
4.0 - 4.5
Streak: 
White
Type Locality: 
Brownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor District, North Pennines, North and Western Region (Cumberland), Cumbria, England, UK

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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.