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Bannisterite

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ALB115801

Bannisterite

Description Tabs

Description
Locality: 
Broken Hill, New South Wales, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 1.5 × 1.1 cm
Largest Crystal: 
0.60cm
Description

Rare phyllosilicate found in the old time excavation of the mine. It is rarely see on the market. Here is a nice sample with brown-black lustrous crystals and crystal cleavages with quartz.

Mineral Data
What's on the rock

Bannisterite

Formula: 
Ca0.5(K,Na)0.5(Mn,Fe,Zn)10(Si,Al)16O38(OH)8·5.5H2O
Strunz: 
9.EG.75
Crystal System: 
Monoclinic
Hardness: 
4.0
Type Locality: 
Benallt Mine (Tyddyn Meirion mine; Ty Canol mine), Rhiw, Llanfaelrhys, Lleyn Peninsula, Gwynedd (Caernarvonshire), Wales, UK

Seller Information

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