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Alunogen & Halotrichite

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SYA591540

Alunogen & Halotrichite

Classic Locality

Description Tabs

Description
Locality: 
Dubník, Červenica, Prešov County, Prešov Region, Slovakia (Slovak Republic)
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 7 × 4 cm
Description

Globular aggregates of clear white alunogen crystals, white fibrous halotrichite and pale yellow fibroferrite.

A classic specimen from the "Josef " mine at Dubnik.

Found in 1981

Mineral Data
What's on the rock

Alunogen

Formula: 
Al2(SO4)3·17H2O
Strunz: 
7.CB.45
Crystal System: 
Trigonal
Hardness: 
1.5 - 2.0
Streak: 
White

Halotrichite

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

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