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Picropharmacolite

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GPM679589

Picropharmacolite

Description Tabs

Description
Locality: 
Jáchymov, Krušné Hory, Karlovy Vary Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.6 × 6.5 × 3.6 cm
Description

Pearly white silky aggregates and small acicular Picropharmacolite crystals covering the matrix on this extremely rich and rare example of this uncommon hydrated arsenate. 

This is a classic, undoubtedly old-time material from the famous old mining district - Jáchymov, Czech Republic.

744

Mineral Data
What's on the rock

Picropharmacolite

Formula: 
Ca4Mg(AsO4)2(HAsO4)2·11H2O
Strunz: 
8.CH.15
Crystal System: 
Monoclinic Needles and encrustations
Hardness: 
1.0 - 2.0
Streak: 
White
Type Locality: 
Ore dumps, Richelsdorf Smelter, Süss, Richelsdorf District, Hesse, Germany

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