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Kapellasite & Cumengeite

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CR28224

Kapellasite & Cumengeite

Rare Mineral

Description Tabs

Description
Locality: 
Herzog Julius Smelter Slag Locality, Astfeld, Goslar, Lower Saxony, Germany
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 3.3 × 2.5 cm
Description

This is a very beautiful specimen from the famous slag locality in Germany.

Deep blue microcrystals of cumengeite with white sprays of laurionite and pale blue green kapellasite in an old slag.

Mineral Data
What's on the rock

Kapellasite

Formula: 
Cu3Zn(OH)6Cl2
Strunz: 
3.DA.10c
Hardness: 
0.0
Type Locality: 
Sounion Mine No. 19 ("Chloridstollen"), Sounion Mines, Sounion area, Lavrion District Mines, Lavrion District (Laurion; Laurium), Attikí Prefecture (Attica; Attika), Greece...

Cumengeite

Formula: 
Pb21Cu20Cl42(OH)40·6H2O
Strunz: 
3.DB.20
Crystal System: 
Tetragonal
Hardness: 
2.5
Streak: 
Sky-blue
Type Locality: 
Santa Rosalía (El Boleo), Boleo District, Mun. de Mulegé, Baja California Sur (BC Sur), Mexico