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Smithite & Uchucchacuaite

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BCK738859

Smithite & Uchucchacuaite

Frank Keutsch collection
Rare Mineral

Description Tabs

Description
Locality: 
Uchucchacua Mine, Oyon Province, Lima Department, Peru
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.9 × 1.6 cm
Description

You are bidding on an exceptional thumbnail with what has proven to be the world's best find of smithite crystals made by Dr. Frank Keutsch during his research at the locality. The sample hosts several beautiful groups of prismatic, wedge-terminated bright red smithite crystals with tiny metallic uchucchacuaite crystals on rhodochrosite. This is one of the best specimens from the very limited find. 

Mineral Data
What's on the rock

Smithite

Formula: 
AgAsS2
Strunz: 
2.GC.30
Crystal System: 
Monoclinic Tabular crystals.
Hardness: 
1.5 - 2.0
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

Uchucchacuaite

Formula: 
AgMnPb3Sb5S12
Strunz: 
2.JB.40a
Crystal System: 
Orthorhombic
Hardness: 
3.5
Colour: 
Grey
Type Locality: 
Uchucchacua Mine, Oyon Province, Lima Department, Peru

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