GRS Gemresearch Swisslab | Meggen is a renowned international gemological research laboratory that specializes in authenticity evaluations for rubies, sapphires, emeralds, and other colored gems. As the leader in colored gemstone reports, GRS GemResearch Swisslab AG is dedicated to providing accurate and reliable information about the origins and authenticity of gemstones. With six international gemological research laboratories strategically located around the world, GRS utilizes the latest sophisticated technology to recognize and identify advanced gemstone treatments.

Their ongoing research efforts include expeditions to the most important gemstone mines, which are documented in film documentaries and book series called Contributions to Gemology. GRS offers a range of services, including gemstone reports for loose gemstones, gemstone pairs, and mounted jewelry. Their gemstone report verification services allow interested parties to verify the authenticity of a GRS report free of charge.

In addition to their services, GRS has an online shop where you can find their latest books and publications. Their latest book, Magnificent Green, takes you on a fascinating journey into the world of Colombian emeralds, as told by miners, patrons, cutters, brokers, and jewelers. With worldwide locations in Switzerland, France, Hong Kong, Sri Lanka, Thailand, and the United States, GRS GemResearch Swisslab AG is dedicated to providing top-notch gemological services