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Sphalerite & Alstonite

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CAM179897

Sphalerite & Alstonite

Classic Locality

Description Tabs

Description
Locality: 
Nentsberry Haggs Mine, Alston Moor, Cumbria, United Kingdom
Size Range: 
Cabinet (10-18 cm)
Size: 
10.2 × 6 × 3.5 cm
Largest Crystal: 
0.80cm
Description

A very rich coverage of highly lustrous dark-brown to black sphalerite crystals up to 8 mm on a quartz matrix and associated with some white dipyramidal crystals of alstonite up to 7 mm and galena crystals.
From the Low Flat horizon on Second Sun Vein, Nentsberry Haggs Mine.
A very fine specimen, ex Greenside specimen.

Mineral Data
What's on the rock

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

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
Cartils Minerals

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