Since the 1940s, when the Gemological Institute of America (G.I.A.) introduced the 4C’s (color, clarity, cut and carat) as ...

The intriguing shapes and colors of sea creatures are turning up in gold and silver, diamonds and aquamarines. Ancient ...

Origin information for a diamond helps you distinguish between natural and laboratory-grown diamonds and deliver a strong message on the good mined diamonds do for the country they come from. Proof of ...