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Baryte Psm Alstonite Sphalerite Galena & Quartz

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LCM37402

Baryte Psm Alstonite Sphalerite Galena & Quartz

Type Locality

Description Tabs

Description
Locality: 
Nentsberry Haggs Mine, Alston Moor, Cumbria, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 4 × 1.5 cm
Largest Crystal: 
0.70cm
Description

A nice piece comprising of a scattering of white altered crystals sitting on untwinned sphalerite and galena, with minor deposits of quartz.

Mineral Data
What's on the rock

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White

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

Sphalerite

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

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White
Lakeland Crystals and Minerals