The Gübelin Gem Lab is one of the world’s most respected gemmological laboratories, entrusted with the testing of the world’s most valuable and exceptional gemstones, diamonds, pearls and jewellery. Over the more than 100 years of its existence, the Gübelin Gem Lab has earned a reputation of integrity, scientific rigour, and for facilitating relevant technological innovations and significant contributions to gemmological research. Equipped with state-of-the-art analytical instruments and staffed by experienced specialists in all its locations, the laboratory provides objective gemstone testing, for all types of gem materials, and with a strong focus on coloured gemstones, including treatment detection and origin determination.  

The laboratory’s reports are recognized internationally for their accuracy and integrity, offering a trusted reference within the global gemstone trade. Through continuous investment in technology and expertise, the Gübelin Gem Lab upholds its founding principle: the pursuit of truth and transparency in gemmology.