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Alstonite

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RPL573317

Alstonite

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 × 4 × 2.5 cm
Largest Crystal: 
0.30cm
Weight: 
37.00gr
Description

Alstonite is a very rare barium, calcium carbonate and this specimen is from the co-type locality, the specimen is a partial vugh and features sharp pseudo-hexagonal dipyramid crystals set on sugary, snow-white baryte crystals with minor amounts of pyrite in the matrix

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

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