GIA’s laboratories use advanced instrumentation and research to deliver accurate grading, identification, and origin ...

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 ...

Diamonds, made of carbon atoms ... The color comes from additional traces of chromium and vanadium. Different trace elements can produce other colors, allowing beryl to form semiprecious stones ...