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Fluorite Galena & Siderite

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NST704959

Fluorite Galena & Siderite

Description Tabs

Description
Locality: 
Weardale, County Durham, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
16.5 × 9 × 4 cm
Weight: 
664.00gr
Description

A fine older example of Siderite coated, greenish-gray Fluorite cubes up to 1.7 cm showing pale-violet daylight-fluorescence and cuboctahedral groups of Galena up to 2.5 cm. Crystallized on front and back side.

Mineral Data
What's on the rock

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Galena

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

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White