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Varlamoffite & Rashleighite

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SKY603603

Varlamoffite & Rashleighite

Rare Mineral

Description Tabs

Description
Locality: 
Gunheath Pit, St Austell, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 2.5 × 2.3 cm
Description

Yellowish crystal aggregates of the rare mineral varlamoffite from this famous English locality, and associated to green rashleighite and yellow acicular crystal groups tentatively identified as fairfieldite or ferromolybdite.

 

Mineral Data
What's on the rock

Varlamoffite

Formula: 
(Sn,Fe)(O,OH)2
Strunz: 
4.DB.05
Hardness: 
6 - 6.5
Colour: 
Yellow
Streak: 
Light Yellow
Type Locality: 
Kalima, Maniema, Democratic Republic of Congo (Zaïre)

Rashleighite

Variety Of: 

Turquoise

Formula: 
Cu(Al,Fe3+)6(PO4)4(OH)8·4H2O
Strunz: 
8.DD.15
Hardness: 
5.0 - 6.0
Formula: 
Cu(Al,Fe)6(PO4)4(OH)8·5H2O
Hardness: 
0.0

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