De Beers fighting to restore monopoly; challenges lie ahead - The Economic Times
Sightholder
De Beers - Monopoly Broken Australian Diamond Portfolio
DTC Sightholder Sales - How De Beers diamond supply system works?
DTC Sightholder FAQ by Alfonso Rusciano - Issuu
De Beers, PDF, Diamond
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De Beers – Gemma News Service
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The De Beers-Botswana Divide - Rapaport
The De Beers-Botswana Divide - Rapaport
Is the 'De Beers commodity' argument valid? Is the price of diamonds artificially inflated by De Beers marketing and control of supply? - Quora