GRA is the standard of excellence in gemstones services worldwide, since 2001 GRA reports have been proven to be the internationally recognized passport for gemstones. For decades trade professionals, throughout the world, turn to GRA for their expertise, consistency and reliability in gemstones identification. GRA’s school of gemstones has been attended by in-trade gemstones manufacturers, fine jewelry artisans and the public at large, from over ninety countries throughout the world.
The methodology employed by GRA’s highly trained and experienced team of hundreds of scientific technicians and gemologists, has allowed for the evolution of the perfect formula regarding gemstone procedures, report record keeping, gem & jewelry security and handling. GRA’s state-of-the-art laboratories are located in the heart of the gem & jewelry districts throughout the world. GRA – The Standard of Excellence in gemstones and Fine Jewelry Evaluation Worldwide.
The certification authority can test the following gems for you.
Citrine is the transparent, pale yellow to brownish orange variety of quartz.
Emerald is the bluish green to green variety of berly, a mineral species that includes aquamarine.
Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.
Dazzling brilliance. Captivating color. These are the planet’s most valued gems.
Diamonds are among nature’s most precious and beautiful creations.