Economy
Petra Diamonds reports marginal 1% revenue increase
![](https://www.jewelleryfocus.co.uk/wp-content/uploads/2015/12/The-Kimberley-Underground-mines-in-South-Africa--e1448967025854-780x470.jpg)
Petra Diamonds has reported a 1% increase in revenue, despite a fall in the price of rough diamonds in the first half of 2016.
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