With new technologies and sustainable practices, lab-grown diamonds are becoming an increasingly popular choice among jewelry shoppers. They’re chemically and physically identical to earth-mined ...

is at the center of one of the world’s most important sources of gem-­quality diamonds. Yet the provincial capital, Tshikapa, betrays nothing of the wealth that lies beneath the ground.

A visitor at an Arkansas state park left with a valuable souvenir after finding a white diamond. On Sept. 27, a guest visiting the Crater of Diamonds State Park in Arkansas was searching for ...