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Ferritungstite Scheelite Mpororoite Scorodite & Native Bismuth On Ferberite

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RHT698525

Ferritungstite Scheelite Mpororoite Scorodite & Native Bismuth On Ferberite

Classic Locality

Description Tabs

Description
Locality: 
Hingston Down Quarry, Calstock, Cornwall, United Kingdom
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 4.8 × 4.1 cm
Weight: 
308.00gr
Description

Yellow micro-crystals of hydrokenoelsmoreite (variety ferritungstite) with orange scheelite, white mpororite & scorodite on massy, black, glossy ferberite (according to label on box). I discovered a little vug with tiny iridescent bismuth crystals on the back.

Pretty rare and interesting combination from a classic Cornish locality.

Mineral Data
What's on the rock

Ferritungstite

Variety Of: 

Hydrokenoelsmoreite

Formula: 
2W2O6(H2O)
Strunz: 
4.DH.15
Hardness: 
3.0 - 0.0
Formula: 
(W,Fe3+)(O,OH)3
Hardness: 
0.0

Scheelite

Formula: 
Ca(WO4)
Strunz: 
7.GA.05
Crystal System: 
Tetragonal
Hardness: 
4.5 - 5.0
Streak: 
White
Type Locality: 
Bispbergs Klack, Säter, Dalarna, Sweden

Mpororoite

Formula: 
WAlO3(OH)3·2(H2O)
Strunz: 
7.GB.35
Hardness: 
0.0
Type Locality: 
Mpororo W Deposit, Kisoro, Kigezi District, Uganda

Scorodite

Formula: 
Fe3+AsO4·2H2O
Strunz: 
8.CD.10
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.0
Type Locality: 
Stamm Asser Mine, Graul, Langenberg, Schwarzenberg District, Erzgebirge, Saxony, Germany

Bismuth

Formula: 
Bi
Strunz: 
1.CA.05
Crystal System: 
Hexagonal
Hardness: 
2.0 - 2.5
Type Locality: 
Schneeberg District, Erzgebirge, Saxony, Germany

Ferberite

Formula: 
FeWO4
Strunz: 
4.DB.30
Crystal System: 
Monoclinic
Hardness: 
4.0 - 4.5
Type Locality: 
Niña Mine, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain
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