Bournonite
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Description: 

Bournonite is a complex sulphide mineral containing copper, lead and antimony. It was first described in 1797 by Cornish gentleman-collector Philip Rashleigh, who included illustrated descriptions of two specimens in his publication Specimens of British Minerals. These specimens came from Wheal Boys, an antimony mine in St Endellion parish.  

In 1858, spectacular specimens of bournonite with distinctive ‘cogwheel-shaped’ crystals, were found at another Cornish mine, Herodsfoot, a lead and silver mine a few miles east of Lostwithiel.  Lostwithiel-based mineral dealer Richard Talling acquired the best of these specimens from the local miners and sold them on to mineral collectors and museums worldwide. This Herodsfoot specimen was almost certainly acquired by the Royal Institution of Cornwall in December 1858, one of a group of specimens purchased from Richard Talling for £8.10s.

Chemical Formula: PbCuSbS

Specimen no. TRURI: 801.908
Location: Herodsfoot 
Grid Reference: SW 212 600

Mindat http://www.mindat.org/min-741.html

 

In Place
In Time
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Location precision: 
Good
Timescale:
Timescale: 
Carboniferous
Ma = Millions of years ago
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Type: 
mineral
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