A poorly cut diamond will appear dull and lifeless, even if it has excellent clarity and color. The GIA grades cut quality on a scale from Excellent to Poor, with higher grades ensuring better ...

For the first time, gemologists and jewelers will have access to an innovative solution for diamond color grading.

The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction ...

According to the Gemological Institute of America (GIA), The Mediterranean Blue exhibits the highest possible color grading for a blue diamond. Its cushion-shaped cut enhances its saturation and ...