Jewelry designer Nina Runsdorf was at a trade show in the early 2000s when a “large brown rock” the size of a pebble caught her eye. The seller told her it was a rough brown diamond. Runsdorf, in ...

And these Chocolate Diamond earrings that J-Lo likes to borrow: just over $16,000, but it wasn't that long ago when brown diamonds would have never made the red carpet, selling for six times less ...

The seller told her it was a rough brown diamond. Runsdorf, in disbelief, said she wanted it verified by the Gemological Institute of America. Sure enough, it came back as a certified 65-carat ...