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Witherite

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PDM745454

Witherite

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Description
Locality: 
Cave In Rock District, Illinois, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.5 × 2 cm
Largest Crystal: 
1.50cm
Description

Group of well-formed, translucent intergrown crystals of witherite with white colour, resinous lustre, and horizontal striations. These crystals are mimetic twins on {110}, similar to the witherites from the type locality in England, and not common in the mines at Illinois.

Ex. René Virlet specimen.

Mineral Data
What's on the rock

Witherite

Formula: 
BaCO3
Strunz: 
5.AB.15
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Streak: 
White
Type Locality: 
Brownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor District, North Pennines, North and Western Region (Cumberland), Cumbria, England, UK

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