Two million Indian workers supply 14 out of 15 cut diamonds globally. Trump’s 50 percent tariffs could disrupt that.

Tom Moses, executive vice president and chief research and laboratory officer for the Gemological Institute of America, ...

Taylor Swift's engagement diamond looks massive - until you compare it to some of the largest diamonds found in Arkansas.

Dominion Diamond Mines owns 40 percent of the mine where the diamond was found and said the gem will not be sold in its rough form. Instead, the company will seek a partner to cut and polish the ...

The Great Star of Africa, a 530.2-carat cut from the 3,106-carat Cullinan rough, remains the largest cut diamond on record. It sits in the British Crown Jewels, guarded by history and tradition. 8.

The increasing popularity of lab-grown gems is creating the biggest disruption in the diamond market since early last century ...

“Our examinations confirmed that the Motswedi is a single gem-quality crystal, type IIa diamond with no detectable nitrogen,” said Dr. Wuyi Wang. “It is the largest known single crystal diamond in ...

Trump's levies threaten to sever India's access to its largest diamond market, which accounts for nearly a third of its $28.5 ...