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Volborthite & Allophane

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HCH170352

Volborthite & Allophane

Description Tabs

Description
Locality: 
Nerother Kopf, Oberstadtfeld, Daun, Eifel, Rhineland-Palatinate, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1 × 1 cm
Description

Yellow and greenish crusts on Lava.

Mineral Data
What's on the rock

Volborthite

Formula: 
Cu3(V2O7)(OH)2·2H2O
Strunz: 
8.FD.05
Hardness: 
3.5
Type Locality: 
Sofronovskii Cu Mine, Yugovskii Zavod, Perm', Permskaya Oblast', Middle Urals, Urals Region, Russia...

Allophane

Formula: 
(Al2O3)(SiO2)1.3-2·2.5-3H2O
Strunz: 
9.ED.20
Crystal System: 
Amorphous
Hardness: 
3.0
Streak: 
White
Type Locality: 
Gräfenthal, Thuringian Forest, Thuringia, Germany

Seller Information

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