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Voltaite & Szomolnokite

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SCH28773

Voltaite & Szomolnokite

Description Tabs

Description
Locality: 
Rio Tinto Mines, Huelva, Andalusia, Spain
Size Range: 
Miniature (4.5-7 cm)
Size: 
3.4 × 5 × 4.2 cm
Description

Excellent bright black octahedral and dodecahedral combinations of voltaite crystals to 4mm are set on globular, stalactitic, vitrous szomolnokite crystals.

There are scattered several sprays of hairy halotrichite and kornelite tufts over the whole specimen.

Rozenite is present as white aggregates and stalactitic groups of thin, tabular rhomboclase crystals are present in most sides.

Several groups of rhomboclase are included with kornelite giving two different colors to the rhomboclase.

There are several more photos avalaible, do not hesitate to ask for them, this is a superb and aesthetic combination!

Mineral Data
What's on the rock

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

Szomolnokite

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

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