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Argentite & Polybasite

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ESM571426

Argentite & Polybasite

Description Tabs

Description
Locality: 
Příbram District, Central Bohemian Region, Czech Republic
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.3 × 6 × 5.2 cm
Description

Metallic grey argentite crystals with polybasite blades and minor pyrite on matrix

Mineral Data
What's on the rock

Argentite

Renamed To: 

Acanthite

Formula: 
Ag2S
Strunz: 
2.BA.35
Hardness: 
2.0 - 2.5

Polybasite

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