Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Stannite & Wolframite

Views:
Watches:
MMM38915

Stannite & Wolframite

Description Tabs

Description
Locality: 
Gunheath Pit, St Austell, Cornwall, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 4 × 2 cm
Description

A rich specimen of steel grey stannite with wolfram and an unknown microcrystalline green mineral on granite matrix.

Collected in 1985 from No. 2 Bench, East.

Mineral Data
What's on the rock

Stannite

Formula: 
Cu2(Fe,Zn)SnS4
Strunz: 
2.CB.15a
Crystal System: 
Tetragonal
Hardness: 
4.0
Streak: 
Black
Type Locality: 
West Wheal Kitty (Wheal Rock), West Wheal Kitty group, St Agnes, St Agnes District, Cornwall, England, UK

Wolframite

Synonym Of: 

Hübnerite

Formula: 
MnWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5

Ferberite

Formula: 
FeWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5
Formula: 
(Fe2+)WO4 to (Mn2+)WO4
Crystal System: 
Monoclinic
Hardness: 
4 - 4.5
Colour: 
Greyish-black
Streak: 
Reddish Brown
Item Toolbox