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β-Roselite & Aragonite

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FDW65354

β-Roselite & Aragonite

Description Tabs

Description
Locality: 
Aghbar Mine, Aghbar, Zagora Province, Drâa-Tafilalet Region, Morocco
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 2.5 × 3.5 cm
Description

This small specimen has a 2cm cavity with mm-sized ß-roselite leaf-shaped crystals (there is no roselite on this specimen, ß-roselite is a more rare and different species at Aghbar).

On top of the ß-roselite grow little aragonite crystals. The black material here and there is probably heterogenite.

Found in December 2009 (BA027)

 

Mineral Data
What's on the rock

β-Roselite

Formula: 
Ca2(Co2+,Mg)(AsO4)2·2H2O
Crystal System: 
Triclinic
Hardness: 
3.5 - 4.0
Streak: 
Red, pale
Type Locality: 
Schneeberg District, Erzgebirge, Saxony, Germany

Aragonite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.15
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Type Locality: 
Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain
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