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Baryte Psm Alstonite With Sphalerite

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RPL928707

Baryte Psm Alstonite With Sphalerite

Pseudomorph

Description Tabs

Description
Locality: 
Nentsberry Haggs Mine, Alston Moor, Cumbria, United Kingdom
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 8 × 7 cm
Largest Crystal: 
0.30cm
Weight: 
660.00gr
Description

Very fine white china white pseudomorphs of alstonite and barytocalcite crystals by baryte strewn across small sphalerite crystals on one face, display really well and quite a large piece for location.

An excellent example of a classic habit.

 

Minor: 
Quartz
Previous labels supplied (not photographed)
Condition
General: 
Excellent - locality specimen
Main Display: 
Excellent - some broken crystals
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

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