Another well-known billionaire art lover was in the de Pury crowd last night: Laurence Graff, the London jeweler, who has set auction records of his own.
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Through Safdico, Graff now buys half of his uncut diamonds from the South African mining behemoth De Beers (Safdico is one of 93 sightholders, or wholesalers who are permitted to buy rough diamonds from De Beers).