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Bobkingite & Parnauite

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SKY591854

Bobkingite & Parnauite

Rare Mineral

Description Tabs

Description
Locality: 
Cerro Minado Mines, Cuesta Alta, Almería, Andalusia, Spain
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.7 × 0.5 × 0.2 cm
Description

Sharp sky blue crystals of this extremely rare mineral bobkingite known from only 3 localities worldwide. By far, Cerro Minado has yielded the best crystals of bobkingite. Associated mineral is green parnauite.

Very rich specimen for the quantity of crystals

For more info, please see the article describing the occurrence on Mineral Up 2010/1 (New Minerals from Cerro Minado), According to the authours of this article, they found the mineral once and only in a very limited area of the mine. Very nice under the microscope.

Mineral Data
What's on the rock

Bobkingite

Formula: 
Cu5Cl2(OH)8·2H2O
Strunz: 
3.DA.50
Hardness: 
3.0 - 0.0
Streak: 
Pale blue
Type Locality: 
New Cliffe Hill Quarry, Stanton under Bardon, Leicestershire, England, UK

Parnauite

Formula: 
Cu9(AsO4)2(SO4)(OH)10·7H2O
Strunz: 
8.DF.35
Hardness: 
0.0
Type Locality: 
Majuba Hill Mine (Majuba Mine; Mylar Mine; Tin Mine; Nevada Bureau of Mines and Geology sample sites 2844 & 2846), Antelope District, Pershing Co., Nevada, USA

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