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Roselite On Cobaltoan Calcite

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PDM777972

Roselite On Cobaltoan Calcite

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Description Tabs

Description
Locality: 
Bou Azzer Mine, Amerzgane, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 5.5 × 4.1 cm
Description

Superb lustrous isolated aggregates of framboise red roselite crystals contrasting beautifully on a carpet of pink coloured cobaltoan calcite crystals that cover two elongated cavities of the carbonate matrix of big size. I sent the specimen for analyses by SEM-EDS because I thought they could be cobaltoan talmessite, but it was confirmed that they are roselite crystals. A copy of this analyses will be given to the buyer.

Ex. Marcus Lueg; Ex Arnaud Gelders collection.

Mineral Data
What's on the rock

Roselite

Formula: 
Ca2(Co2+,Mg)(AsO4)2·2H2O
Strunz: 
8.CG.10
Hardness: 
3.5
Type Locality: 
Rappold Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Cobaltoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Co)CO3
Hardness: 
0.0

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