Jewelry designer Nina Runsdorf was at a trade show in the early 2000s when a “large brown rock” the size of a pebble caught ...

When shopping for a diamond, whether for an engagement ring or a piece of fine jewelry, you’ll quickly encounter the term Four Cs—Cut, Color, Clarity, and Carat Weight. These four characteristics ...

There are few things more beautiful in this world than a brilliant diamond. But diamonds are extremely valuable and expensive, and sometimes people try to pass off a fake as the real thing. There are ...

The rare Graff diamond, which a devoted husband purchased for his wife during their marriage, will be auctioned off at Sotheby's later this month.

Determining the authenticity of a diamond requires professional equipment and a highly trained eye. At-home tests do exist—from the fog test to the water-drop test—but the only way to be sure is by ...