IN BRIEF: Petra Diamonds shares rise as finds 41.82 carat blue diamond

Petra Diamonds Ltd - South Africa and Tanzania-focused diamond miner - Recovers a 41.82-carat type IIb blue diamond of seemingly exceptional colour and clarity at its Cullinan Mine in South Africa. The company is analysing the stone and assessing the preferred method of sale, with further updates on marketing to follow.

Current stock price: 18.56 pence each, up 9.2% on Tuesday afternoon in London

12-month change: down 28%

By Tom Budszus, Alliance News slot editor

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Petra Diamonds