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Quartz Psm Psm Fluorite With Sphalerite & Brianyoungite

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EDC201952

Quartz Psm Psm Fluorite With Sphalerite & Brianyoungite

Classic Locality

Description Tabs

Description
Locality: 
Rampgill Mine, Nenthead, Cumbria, United Kingdom
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 7 × 2.5 cm
Description

A classic quartz epimorph after fluorite from the boundary cross vein of Rampgill Mine. This has a number of sphalerite crystals and fluorite cubes within the epimorphs and is backed with siderite. The sphalerites are coated with a dusting of brianyoungite.

Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

Brianyoungite

Formula: 
Zn3(CO3,SO4)(OH)4
Strunz: 
5.BF.30
Crystal System: 
Orthorhombic or Monoclinic
Hardness: 
2.0 - 2.5
Streak: 
White
Type Locality: 
Brownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor District, North Pennines, North and Western Region (Cumberland), Cumbria, England, UK

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