Batwara says that GIA is considered “the foremost authority in diamond gradings.” The GIA has a scale for round diamonds (and ...

Carlsbad, Calif., April 08, 2025 (GLOBE NEWSWIRE) -- A team of scientists from the Gemological Institute of America (GIA), collaborating with their colleagues from the Smithsonian National Museum ...

“The Winston Red diamond is one of the most exquisite gems on earth, from its unparalleled deep-red color to its rich history,” said Susan Jacques, GIA president and CEO.“Natural fancy ...