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Acanthite Polybasite & Pyrite

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QBM939241

Acanthite Polybasite & Pyrite

Description Tabs

Description
Locality: 
Casapalca Mine, Huarochiri Province, Lima Department, Peru
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.8 × 1.4 cm
Description

Superb and uncommon Acanthite specimen with Polybasite and Pyrite from Casapalca, Peru. It comes from the collection of R and W Rossel, Berlin, Germany with a label. Displays very attractive structure with some skeletal features of lustrous irregular Acanthite crystals. Sparkling yellow Pyrite crystals grow around. On the label is marked Polybasite too. Complete all over 360 degree. In superb condition. On acrylic base.

Marvelous!

Shipping weight up to 0.250 kg

#15223

Mineral Data
What's on the rock

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

Polybasite

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

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5