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Alfredopetrovite Ahlfeldite & Chalcomenite

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RSL687704

Alfredopetrovite Ahlfeldite & Chalcomenite

Type Locality

Description Tabs

Description
Locality: 
El Dragón Mine, Quijarro Province, Potosi Department, Bolivia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 0.7 × 0.8 cm
Description

Druse of tiny alfredopetrovite crystals, colorless to greyish tone, coating over blue chalcomenite and pink ahlfeldite. Some areas, with no colored background minerals, let us to see perfectly crystals. You can also observe face reflections of this extremely rare species. Alfredopetrovite is the first aluminium selenite mineral. On a krut'aite-penroseite matrix. With original Alfredo handwritten label. A really good specimen.

Mineral Data
What's on the rock

Alfredopetrovite

Formula: 
Al2(Se4+O3)3·6H2O
Crystal System: 
Hexagonal
Type Locality: 
El Dragón Mine, Potosí Department, Bolivia

Ahlfeldite

Formula: 
(Ni,Co)SeO3·2H2O
Strunz: 
4.JH.10
Crystal System: 
Monoclinic
Hardness: 
2.0 - 2.5
Type Locality: 
Virgen de Surumi mine (Pacajake mine; Pakajake mine), Pakajake Canyon (Pacajake Canyon), Chayanta Province, Potosí Department, Bolivia

Chalcomenite

Formula: 
CuSeO3·2H2O
Strunz: 
4.JH.05
Crystal System: 
Orthorhombic
Hardness: 
2.0 - 2.5
Type Locality: 
Cerro de Cacheuta, Sierra de Cacheuta, Mendoza, Argentina
Labels
Label Images - only: Alfredopetrovite Ahlfeldite & Chalcomenite