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Walpurgite & Atelestite

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CR771603

Walpurgite & Atelestite

Rare Mineral

Description Tabs

Description
Locality: 
Schmiedestollen, Wittichen, Black Forest, Baden-Württemberg, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 0.9 × 0.7 cm
Description

Small globular Atelestite with beautiful gemmy and sharp, yellow Walpurgite crystals on matrix.

Rich old specimen - collected 1982. Ex Armin Wendland collection.

Mineral Data
What's on the rock

Atelestite

Formula: 
Bi2(AsO4)O(OH)
Strunz: 
8.BO.15
Crystal System: 
Monoclinic
Hardness: 
4.5 - 5.0
Type Locality: 
Neuhilfe Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Walpurgite

Formula: 
(BiO)4(UO2)(AsO4)2·3H2O
Strunz: 
8.EA.05
Hardness: 
3.5
Type Locality: 
Walpurgis Flacher vein, Weißer Hirsch Mine (Shaft 3), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany