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Geocronite With Galena

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PDM779110

Geocronite With Galena

Description Tabs

Description
Locality: 
Uranium Mine #16, Háje, Příbram, Central Bohemian Region, Czech Republic
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 2.3 × 1.6 cm
Description

Silver grey microcrystalline geocronite interbedded with darker grey galena crystals, which is typical in this Classic locality. Good representative specimen of this uncommon lead sulphide with Sb and As.

Acquired in 1990. Ex. geologist Bob Janssens collection #1661.

Mineral Data
What's on the rock

Geocronite

Formula: 
Pb14(Sb,As)6S23
Strunz: 
2.JB.30a
Hardness: 
2.5 - 3.0
Type Locality: 
Sala Silver Mine, Sala, Västmanland, Sweden

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

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