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Coquimbite & Voltaite

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CR1017841

Coquimbite & Voltaite

Classic Locality

Description Tabs

Description
Locality: 
Alfredo Pit, Rio Tinto Mines, Huelva, Andalusia, Spain
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.3 × 7 × 5 cm
Description

This is a ver colorful and aesthetic specimen from the famous Alfredo Pit in Southern Spain.

Beautiful violet Coquimbite crystals all over the specimen with black Voltaite crystals and minor Chalcanthite and Botryogen.

Very good display specimen - collected 1999.
 

Mineral Data
What's on the rock

Coquimbite

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

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