Awash in yellow, a gem miner near Ratnapura, Sri Lanka, separates stones from clay-laden mud.

在斯里兰卡的拉特纳普勒，一位宝石采矿者正在黄色的泥水里通过冲洗淘出宝石。

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In 2008 Graff achieved full vertical integration when he bought a stake in publicly traded diamond miner Gem Diamonds.

FORBES: In Pictures: The 2009 Billionaire List

In 2008 he achieved full vertical integration when he bought a stake in publicly traded diamond miner Gem Diamonds.

FORBES: Laurence Graff