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Acanthite & Kutnohorite

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JYJ500215

Acanthite & Kutnohorite

EDS analysed

Description Tabs

Description
Locality: 
Rejang Lebong District, Bengkulu Province, Indonesia
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.6 × 4 × 3 cm
Description

Beautiful grey metallic wire like acanthite, partly forming bigger aggregates with kutnahorite/rhodochrosite from a very interesting mine with an Au-Ag-Mn mineralisation.

Including analysis, oxygen can be neglected and was not deconvoluted while doing the analysis.

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

Kutnohorite

Formula: 
Ca(Mn,Mg,Fe)(CO3)2
Strunz: 
5.AB.10
Hardness: 
3.5 - 4.0
Type Locality: 
Poličany, Kutná Hora (Kuttenberg), Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic
Analysis
Analysis Report - only: Acanthite & Kutnohorite