Images Dated 29th May 2013

Bournonite with Quartz, Herodsfoot Mine, Lanreath, Cornwall, England

Steel-grey twinned bournonite crystals, in distinctive cog wheel formation, with colourless quartz. This fine specimen from the lead and silver mine, Herodsfoot, may have been acquired by the Royal Institution of Cornwall as part of a group of specimens purchased from Richard Talling, the great Cornish mineral dealer, for £8.10s in December 1858. Bournonite, a rare sulphide of copper, lead and antimony, was first described in 1797 by Philip Rashleigh of Menabilly in Cornwall, who included illustrated descriptions of two specimens in his publication Specimens of British Minerals, Selected from the Cabinet of Philip Rashleigh. The specimens described by Rashleigh came from Wheal Boys, an antimony mine in St Endellion parish and the type locality for bournonite

© RIC, photographer A.G. Tindle

Person standing on rocks,Sylvan Lake,Custer State Park, Black Hills, Custer County

Person standing on rocks,Sylvan Lake,Custer State Park, Black Hills, Custer County, South Dakota, USA. MR

© Christian Heeb/ AWL Images Ltd

Rolling Green Hills of Spring Wheat, Palouse, Idaho, USA

Wheat is a grass widely cultivated for its seed, a cereal grain which is a worldwide staple food. There are many species of wheat which together make up the genus Triticum, the most widely grown is common wheat (T. aestivum). Wheat is an important source of carbohydrates. Globally, is the leading source of vegetal protein in human food, having a protein content of about 13 percent, which is relatively high compared to other major cereals and also of low quality. The Palouse is a major agricultural area, primarily producing wheat and legumes

© Terry Eggers / DanitaDelimont.com