A Cartier diamond and turquoise tiara once owned by Nancy Astor, an American-born British politician who became the first woman to take a seat in the House of Commons, is set to be auctioned next week ...

Christie's forthcoming "Magnificent Jewels" auction will feature a bevy of historic pieces, including a diamond once owned by ...

If you or your partner have $5 million to spare, your engagement ring could get a major upgrade. A rare 10-carat pink diamond ring will go up for auction at Christie's in New York City next month. It ...