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Rhomboclase Römerite & Coquimbite

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TPX917356

Rhomboclase Römerite & Coquimbite

Classic Locality

Description Tabs

Description
Locality: 
Alfredo Pit, Rio Tinto Mines, Huelva, Andalusia, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 2.8 × 2 cm
Weight: 
26.00gr
Description

Very interesting group of stalactitic crystals of these rare minerals that appeared many years ago when Pozo Alfredo was in full work in the 90s.
These minerals in theory are stable, but the stability of these salts depends on the microclimate of each locality, so i strongly advise keeping the specimen in a methacrylate urn.

The total weight is with the included urn.

Mineral Data
What's on the rock

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

Römerite

Formula: 
Fe2+Fe3+2(SO4)4·14H2O
Strunz: 
7.CB.75
Hardness: 
3.0 - 3.5
Type Locality: 
Rammelsberg Mine, Rammelsberg, Goslar, Harz, Lower Saxony, Germany

Coquimbite

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

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