The Global Gemological Research Association (GRA) is an independent jewelery institute. We specialize in identifying gems and jewels. We provide reliable and accurate gem and jewel testing service. Our quality report is certified by experienced professional gemologists.
We have a total of 50 laboratory locations in 8 different countries that provide the quality certification.
TESTING AND CERTIFICATION
To maintain the highest quality standards, GRA has established an international standard laboratory equipped with cutting-edge gemstone testing equipment, modern technology and a team of extremely qualified and experienced gemologists who test and certify your diamonds, moissanite, gemstones and jewellery. With an incredibly advanced set-up, we provide diamond and moissanite grading, gemstone identification and jewelry quality analysis.
GRA® grades the widest range of gemstones and jewelry in more corners of the world than any other gemological organization.
Known for diamonds and colored gemstones, we are equally trusted with the grading of various moissanite shapes, color, cut, clarity and fine jewelry.
As the global leader in moissanite and jewelery appraisal, our experience and reach is second to none.
The world's major authority on gemmology securing the public's trust since 2001.