Kate Middleton's had an on-again, off-again relationship with her engagement ring for a year. What's the royal secret about ...

AFP via Getty Images Visitors focused on the 10 ... diamonds ever discovered. Sotheby’s expects it to be auctioned off at $20 million in May. A 40.29-carat radiant-cut fancy light pink diamond ...

The latest blue diamond to hit the auction block certainly lives up to its namesake. The 10.03-carat Mediterranean Blue gem will be the crown jewel at Sotheby’s High Jewelry Auction this May ...

Marke is a New York–based brand that specializes in classic, timeless rings that are still sleek enough to keep up with the ...