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Alstonite

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WND806591

Alstonite

Type Locality
Rare Mineral

Description Tabs

Description
Locality: 
Brownley Hill Mine, Nenthead, Cumbria, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.6 × 2.1 × 2.8 cm
Description

Several scalenohedral crystals of rare Ba-carbonate alstonite perched in a vug. They are sharp edged, lustrous and well developed. The major crystals are in fresh and undamaged shape. A good and meaningful sample from the typelocality.

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
Wendel Minerals

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