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Alstonite

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CR838039

Alstonite

Ex Richard W. Barstow collection

Description Tabs

Description
Locality: 
Fallowfield Mine, Acomb, Northumberland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.2 × 3.2 × 2.3 cm
Description

A vuggy matrix is lined and covered all around with drusey small sharp scalenohedral crystals of alstonite.

Ex Richard W. Barstow collection

 

Minor: 
Baryte
Condition
General: 
Excellent
Main Display: 
Excellent - some broken crystals
Lustre: 
Soft
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