Diamonds are uniquely valuable due to their extreme hardness and exceptional thermal conductivity, making them the hardest known natural material, about 58 times harder than any other, according to ...

The discovery of the Lucara Diamond in August in the Karowe Mine in northeast Botswana rocked the jewelry industry, but few were as moved by the historic find as Susan Jacques, the president and chief ...

After decades of growth driven by diamond mining, Canada’s Northwest Territories are facing the closure of three major mines and wondering: What’s next? A pit at the Diavik mine, one of the three ...

A worker inspects a diamond during a polishing process in Gaborone, Botswana, March 18, 2008 (AP photo by Themba Hadebe). Diamonds are losing their sparkle, at least for the stones dug out of the ...

The decline of diamonds as a store of wealth is accelerating as low-cost laboratory gems seize more of the market, eating into the share of mined stones and devaluing family heirloom jewelry. Not a ...