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

but weak demand is largely to blame for declining natural-diamond prices. It has been bad enough that Anglo American-owned De Beers, one of the world’s largest diamond miners, reduced its rough ...

If a lab-grown diamond lasts as long as a traditional, mined diamond and delivers just as much sparkle, then you can save ...

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 ...