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Kapellasite Cumengeite & Gypsum

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RSL724940

Kapellasite Cumengeite & Gypsum

Classic Locality

Description Tabs

Description
Locality: 
Herzog Julius Smelter Slag Locality, Astfeld, Goslar, Lower Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.3 × 1.6 cm
Description

Very aesthetic fibrous to tabular crystals of kapellasite. with an intense blue, and associated with gypsum colorless crystals. Accompanied by blue cumengeite crystals. Kapellasite is a rare copper & zinc chloride, formed in the old slag dumps of the ancient smelter started around 1270 and closed in 1968.

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

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.