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Polybasite

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NST679800

Polybasite

Arthur Kusche, Munich
With Antique Label

Description Tabs

Description
Locality: 
Banská Štiavnica, Banská Štiavnica County, Banská Bystrica Region, Slovakia (Slovak Republic)
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.8 × 3.5 cm
Description

Fine old-timer of Polybasite from Banská Štiavnica (Schemnitz). Comes with a handwritten label of Arthur Kusche, a german dealer, running his business from 1911 to 1924. And a younger, typewritten label of Dr. F. Krantz, Bonn.

Mineral Data
What's on the rock

Polybasite

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