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Azurite On Magnetite & Bornite

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BSM577911

Azurite On Magnetite & Bornite

Collected 27/3/1960 (Min. Mag. 29 no.214)

Description Tabs

Description
Locality: 
Kilchrist, Broadford, Isle of Skye, Scotland, United Kingdom
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
5 × 9.8 × 3 cm
Description

A dense crystalline specimen of magnetite with traces of bornite, the alteration of which has given rise to a bright blue coating of azurite. The cream coloured material is relatively soft and has not been identified.

Label supplied is a photocopy of the original.

C.E.Tilley Ph.D; F.R.S (Dept Mineralogy & Petrology, Cambridge Univ) first read part of his paper on zoned contact skarns in 1948 and published in Min Mag 29. No.214 in September 1951.

Previous labels supplied (not photographed)
Mineral Data
What's on the rock

Azurite

Formula: 
Cu3(CO3)2(OH)2
Strunz: 
5.BA.05
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0
Type Locality: 
Chessy copper mines, Chessy-les-Mines, Le Bois d'Oingt, Rhône, Rhône-Alpes, France...

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

Bornite

Formula: 
Cu5FeS4
Strunz: 
2.BA.15
Crystal System: 
Tetragonal
Hardness: 
3.0
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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