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Kapellasite & Gypsum

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RSL687665

Kapellasite & 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: 
1.3 × 1.3 × 0.9 cm
Description

Very aesthetic fibrous to tabular crystals of kapellasite. with an intense blue, and associated with gypsum colorless 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...

Gypsum

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