For more than two decades, Gemological Science International (GSI) has served the global jewelry industry as an independent, science-driven gemological organization. With state-of-the-art laboratories and a team of highly trained gemologists, GSI provides accurate, consistent, and scalable services that support retailers, manufacturers, brands, and wholesalers across every stage of the jewelry supply chain.

At GSI, gemological reporting is more than documentation—it is a responsibility. Each report represents not only technical findings, but also the reputation of the businesses that rely on it and the confidence of the consumers they serve.