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Petra Diamonds finds rare 25.5 carat blue gem

Kerry Hall | April 18, 2013 | 1:37 am Africa Europe Diamond 

[caption id="attachment_719986" align="alignleft" width="300"] Rough 25.5 carat stone[/caption] Petra Diamonds (LSE:PDL) announced it recovered a 25.5 carat blue diamond at the Cullinan mine in South Africa. The gem is considered to be of high quality and top colour. Blue diamonds are...

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