IN A TWIST of geological poetry, Rio Tinto’s Diavik Diamond Mine in Canada’s remote Northwest Territories has delivered one ...

YELLOWKNIFE, Canada -- Rio Tinto has unearthed one of the largest gem-quality yellow diamonds ever discovered in Canada, from ...

Sotheby’s expects it to be auctioned off at $20 million in May. AFP via Getty Images Visitors focused on the 10-karat blue diamond from South Africa, considered one of the most important blue ...

The 158.20-carat rock is one of only five yellow diamonds weighing more than 100 carats ever found at Diavik in its 22-year history.

A rare exhibition featuring $100 million worth of diamonds was held in Abu Dhabi. A key highlight was a 10-karat blue diamond ...