Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Quartz Epimorphs Psm Fluorite With Fluorite Sphalerite & Brianyoungite

Views:
Watches:
PCZ195967

Quartz Epimorphs Psm Fluorite With Fluorite Sphalerite & Brianyoungite

Description Tabs

Description
Locality: 
Rampgill Mine, Nenthead, Cumbria, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.5 × 5 × 2.5 cm
Description

There is lots going on with this highly unusual yet attractive specimen. Hollow epimorphs in quartz after cubic fluorite crystals which have at some point been dissolved out. On top of this there is a second growth of small pale yellow fluorite crystals. Also present are black sphalerites with a part coating of white brianyoungite. The reverse of the piece is coated with black goethite pseudomorphs after siderite.

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
Peter Crozier Minerals