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Tarbuttite On Smithsonite

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BSM88323

Tarbuttite On Smithsonite

ex tony ellis collection #1101

Description Tabs

Description
Locality: 
Broken Hill (Kabwe Mine), Central Province, Zambia
Size Range: 
Cabinet (10-18 cm)
Size: 
12 × 6.3 × 4.2 cm
Description

reddish brown matrix hosts a layer of botryoidal smithsonite from which protrude several individual whitish crystals and over the whole surface is a dense mass, in some places forming cauliflower like growths, of tiny white to cream crystals of tarbuttie.  Many of these are doubly terminated.

the original label incorrectly identifies the specimen as pyromorphite, but the crystal habit and form would suggest tarbuttite, certainly not pyromorphite.

Mineral Data
What's on the rock

Tarbuttite

Formula: 
Zn2(PO4)(OH)
Strunz: 
8.BB.35
Crystal System: 
Triclinic
Hardness: 
3.5
Streak: 
White
Type Locality: 
Kabwe Mine (Broken Hill Mine), Kabwe (Broken Hill), Kabwe District, Central Province, Zambia

Smithsonite

Formula: 
ZnCO3
Strunz: 
5.AB.05
Hardness: 
4.0 - 4.5
Streak: 
White
Provenance

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