Russell Shor, May 29, 2019

Learn about the differences – and similarities – between natural and laboratory-grown diamonds, and how GIA’s researchers and grading laboratories can tell the difference

Russell Shor, May 17, 2019

The journey of a cultural landmark from Prussia to Russia. The first room is lost to history; the second is reconstructed by the Soviet Union.

Sharon Bohannon, May 17, 2019

Trapiche emeralds, which display a distinct six-spoke wheel pattern, set the standard as some of the finest and most spectacular crystals unearthed.

Wuyi Wang and Evan Smith, May 15, 2019

GIA examines a 552.7 ct diamond from the Diavik mine in Canada.

Duncan Pay and Erin Hogarth, May 15, 2019

At the AGTA show, Bridges Tsavorite unveiled the largest known square cushion-cut tsavorite, weighing 116.76 ct.

Troy Ardon and Garrett McElhenny, May 15, 2019

A composite of synthetically grown and natural diamond was recently identified by the Carlsbad laboratory.