the Diamond Grading class explores how to grade diamonds consistently and accurately using a modern gem microscope and a loupe. Students study GIA’s International Diamond Grading System™, explore time ...

Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading ...

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 ...

(PRESS RELEASE) CARLSBAD, CA — A team of scientists from the Gemological Institute of America (GIA), collaborating with their colleagues from the Smithsonian National Museum of Natural History ...

“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 ...

The Gemological Institute of America (GIA) recently examined the Winston Red, a rare red diamond weighing 2.33 carats, prior to its premiere in a public exhibition at the Smithsonian Museum. The stone ...

We take a closer look at the path to acquiring museum-quality coloured diamonds and building a legacy collection of these ...

When it comes to diamonds, carat weight plays a significant role in their overall value. A high quality 4 carat diamond ring is not just a ...

Brad Brooks-Rubin is a former senior advisor in the Office of Sanctions Coordination at the US Department of State. He has also worked for GIA and the Responsible Jewellery Council, so he understands ...

As sophisticated synthetic and treated diamonds become more prevalent in the marketplace, retail jewelers need reliable, on-the-spot verification tools to protect their businesses and customers. In ...