Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Polybasite Acanthite & Stephanite

Views:
Watches:
RSL596620

Polybasite Acanthite & Stephanite

Classic Locality

Description Tabs

Description
Locality: 
San Juan de Rayas Mine, Guanajuato, Guanajuato Municipality, Guerrero, Mexico
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 3 × 2.3 cm
Description

Very rich specimen formed by several polybasite hexagonal crystals, brilliant, partially covered by chalcopyrite and stephanite. They are peppered by aesthetic acanthite crystals showing well defined cube and octahedron faces. Really excellent miniature from the famous San Juan de Rayas Mine at Guanajuato, México.

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

Acanthite

Formula: 
Ag2S
Strunz: 
2.BA.35
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.0 - 2.5
Streak: 
lead grey
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Stephanite

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