Tullow Oil: The Kingfisher well at the Lake Albert Rift Basin, in Uganda. Tullow Oil added 4.1 per cent to €3.33 in Dublin yesterday

Irish shares and the broader European market ended the session on Monday little changed, following a choppy session which saw early gains give way to (...)

Petra Diamonds’s Finsch mine in South Africa. Photograph: Petra Diamonds

Petra Diamonds forecast full-year revenue below market expectations as the smaller diamonds mined from late stage ores at its Finsch and Cullinan mine(...)

The value of a 122.5 carat blue diamond retrieved from the Cullinan mine near Pretoria could exceed the world record figure of $35.3 million (€26 million) paid for a 507 carat white diamond,  also recovered there. Pictured is a similar cut diamond  weighing 10.48 carats sold at auction in 2008. Photograph: Fabrice Coffrini/AFP/Getty Images

Miners in South Africa have unearthed a diamond thought to be one of the largest ever found of its variety.The 122.5 carat blue diamond was retrieved (...)