To Mbuyi Mwanza, a 15-year-old who spends his days shoveling and sifting gravel in small artisanal mines in southwest Democratic Republic of Congo, diamonds symbolize something much more immediate ...

If you gaze into the Winston Red Diamond long enough, it almost seems to burn. The 2.33-carat gem gleams a deep, saturated ...

While it may look like a blazing red ruby, the 2.33-carat Winston Red Diamond is just that—a diamond. One of the rarest ...

A ring set with a 3.51-carat, old mine cut diamond, ... “You can’t just order an old diamond, it’s a more organic way of purchasing a stone,” Ms. Morrissey said.

It's an old-mine cushion cut. GUEST ... I just had to let you know about the diamond. GUEST: Well, I'm glad you did. That made my day. (laughing) My year. APPRAISER: Yeah, but thanks for coming.

The Marie-Thérèse Pink, thought to have belonged to Marie Antoinette, was auctioned by Christie’s in New York.

The Botswana government says the huge 2,492-carat diamond is the second-biggest ever discovered in a mine. It's the biggest diamond found since 1905. It weighs approximately half a kilogram.