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Jarosite

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FNW41760

Jarosite

Type Locality

Description Tabs

Description
Locality: 
Sierra Almagrera, Cuevas del Almanzora, Almeria, Andalusia, Spain
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 4.2 × 1.4 cm
Description

Very rich specimen of lustrous and gemmy amber to brown jarosite crystals coating the matrix.
Very fine piece from the type locality.

Anecdotally we can say that the NASA opportunity rover prospecting on planet mars found jarosite that may point to the rock's wet history having been in an acidic lake or an acidic hot springs environment, like in barranco jaroso deposit.

Mineral Data
What's on the rock

Jarosite

Formula: 
KFe3+ 3(SO4)2(OH)6
Strunz: 
7.BC.10
Crystal System: 
Trigonal - Pyramidal Class
Hardness: 
2.5 - 3.5
Type Locality: 
Jaroso Ravine, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain
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