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Plumbogummite & Stolzite

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JYJ534937

Plumbogummite & Stolzite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 1.9 × 1.3 cm
Description

Analysed plumbogummite spheres in a vug with stolzite. The matrix consists out of germanite/chalcocite.

Mineral Data
What's on the rock

Plumbogummite

Formula: 
PbAl3(PO4)2(OH)5·H2O
Strunz: 
8.BL.10
Hardness: 
4.0 - 5.0
Type Locality: 
Huelgoat (Locmaria-Berrien), Finistère, Brittany, France

Stolzite

Formula: 
Pb(WO4)
Strunz: 
7.GA.05
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
Cínovec / Zinnwald (Cinvald), Erzgebirge; Krusné Hory Mts, Saxony & Ústí Region (Bohemia; Böhmen; Boehmen), Germany & Czech Republic