GRS GemResearch Swisslab AG is an independent gemological research laboratory specializing in determining the origins of, and generating authenticity reports for, rubies, sapphires, and emeralds as well as other important colored gems including spinel, tourmaline, and garnet.

GRS's six international gemological research laboratories are strategically located in key global sites and are equipped with the latest sophisticated technology to recognize and identify advanced gemstone treatments. Ongoing research efforts paired with expeditions to the world’s most important gemstone mines appear in our own film documentaries and book series «Contributions to Gemology».