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Chalcanthite Rhomboclase Coquimbite Szomolnokite & Voltaite

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SCH44531

Chalcanthite Rhomboclase Coquimbite Szomolnokite & Voltaite

Description Tabs

Description
Locality: 
Rio Tinto Mines, Huelva, Andalusia, Spain
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.9 × 3.6 × 4.7 cm
Description

Superb neon blue chalcanthite crystals, that glow when backlit, are set on a matrix with a very rich paragenesis, including excellent groups of rhomboclase, groups of transparent coquimbite covering most of the matrix, bright voltaite crystals and scattered szomolnokite crystals.

Chalcanthite from Riotinto is very rare, as most of the labeled as such, are in fact, melanterit, and even it is extremely rare in good crystals. Exceptional specimen from this classic locality, no more available. More photos avalaible upon request.

Mineral Data
What's on the rock

Chalcanthite

Formula: 
CuSO4·5H2O
Strunz: 
7.CB.20
Crystal System: 
Triclinic - Pinacoidal
Hardness: 
2.5
Streak: 
White
Type Locality: 
Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile

Rhomboclase

Formula: 
(H5O2)Fe3+(SO4)2·2H2O
Strunz: 
7.CB.55
Hardness: 
2.0
Streak: 
White
Type Locality: 
Smolník (Schmöllnitz; Szomolnok), Gelnica Co., Košice Region, Slovakia

Coquimbite

Formula: 
Fe2-xAlx(SO4)3·9H2O, x ~0.5
Strunz: 
7.CB.55
Hardness: 
2.5
Streak: 
white
Type Locality: 
Coquimbo Region, Chile

Szomolnokite

Formula: 
FeSO4·H2O
Strunz: 
7.CB.05
Hardness: 
2.5
Type Locality: 
Smolník (Schmöllnitz; Szomolnok), Gelnica Co., Košice Region, Slovakia

Voltaite

Formula: 
K2Fe2+5Fe3+3Al(SO4)12·18H2O
Strunz: 
7.CC.25
Hardness: 
3.0 - 3.5
Type Locality: 
Solfatara di Pozzuoli, Pozzuoli, Phlegrean Fields, Naples Province, Phlegrean Volcanic Complex, Campania, Italy
schani

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