Bloomberg reports rough diamond price gains may slow in the second half of the year after surging on demand from China and India.

The market news is quoted as saying,

Prices of rough, or unpolished, gems jumped more than 49 percent in the first six months, building on two straight annual gains of more than 30 percent, according to WWW International Diamond Consultants Ltd. Prices have advanced as mine operators struggle to meet Chinese and Indian demand after slashing output during the global financial crisis.

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