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Bismutite Psm Bismuthinite

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PDM826638

Bismutite Psm Bismuthinite

Pseudomorph

Description Tabs

Description
Locality: 
Maya-Moto, Mwenga, South Kivu, DR Congo
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.9 × 3.9 × 2.2 cm
Description

Good size aggregate of elongated grey bismuthinite crystals transformed to whitish-yellow and pink bismutite. Associated to quartz and muscovite, it is a rounded piece due to some alluvial transport, that is typical for the locality, similar to those specimens deposited at the Royal Museum for Central Africa (Tervuren, Belgium). Minor bismite and waylandite are usually present in these pseudomorphs.

From the collection of Eudore Toussaint, a Belgian chemical engineer in the DR. Congo from 1948 to 1971. We combine shipping!

Mineral Data
What's on the rock

Bismutite

Formula: 
(BiO)2CO3
Strunz: 
5.BE.25
Crystal System: 
Tetragonal
Hardness: 
2.5 - 3.5
Streak: 
Grey
Type Locality: 
Arme Hilfe Mine, Ullersreuth, Hirschberg, Vogtland, Thuringia, Germany

Bismuthinite

Formula: 
Bi2S3
Strunz: 
2.DB.05
Hardness: 
2.0 - 2.5
Streak: 
Lead-gray

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