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Coquimbite Römerite & Halotrichite

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QBM961050

Coquimbite Römerite & Halotrichite

Description Tabs

Description
Locality: 
Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 2.9 × 1.8 cm
Description

A mesmerizing specimen of colorful coquimbite with romerite and halotrichite from an amazing find in Monte Arsiccio Mine, Tuscany, Italy. The piece comes from unique find of the “Great Sulphates Geode” in December 2018. It displays coquimbite crystals with a rich purple color. Olive-green romerite crystals are seen too. Some hairy white halotrichite needles grow at the top. In order to preserve the specimen for a long time it must be stored in a box, isolated from the humidity changes. In very good condition. In a plastic box.

Beautiful

Shipping weight up to 0.250kg

#20196

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

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

Halotrichite

Formula: 
FeAl2(SO4)4·22H2O
Strunz: 
7.CB.85
Hardness: 
1.5 - 2.0
Streak: 
White