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Rashleighite

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WND842113

Rashleighite

Classic Locality

Description Tabs

Description
Locality: 
Castle-an-Dinas Mine, St Columb Major, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2 × 1.6 cm
Description

This superfine and oldtimed specimen features numerous cluster of turqouise-green Rashleighite, a Turquoise variety. The crystals are almost well developed, sharp edged and lucent to transparent. This is in any case a superb and rare specimen in splendid condition and exceedingly hard to come by. The Castle-an-Dinas Mine was under construction during the two world wars but the main period was during 1945-1958.  In this period the mine produced about 3000 tons of tungsten.

Mineral Data
What's on the rock

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
Wendel Minerals

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