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Stephanite & Polybasite

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MNR117815

Stephanite & Polybasite

Classic Locality

Description Tabs

Description
Locality: 
Svornost Mine, Jáchymov, Krušné Hory, Karlovy Vary Region, Czech Republic
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.2 × 3 × 2.2 cm
Largest Crystal: 
0.30cm
Description

Group of well developed stephanite on matrix with minor polybasite from classic locality. No damage! Rarely seen nowadays. Material is dating to 1970's.

Free shipping up to 1 kg (2 lbs), if conditions met (see the auction header).

Mineral Data
What's on the rock

Stephanite

Formula: 
Ag5SbS4
Strunz: 
2.GB.10
Crystal System: 
Orthorhombic - Pyramidal
Hardness: 
2.0 - 2.5
Type Locality: 
Freiberg District, Erzgebirge, Saxony, Germany

Polybasite

Formula: 
[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Strunz: 
2.GB.15
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.5 - 3.0
Streak: 
black