IGI buys AGL to create a Global Powerhouse in Coloured Gemstone Certification

The International Gemological Institute (IGI) has acquired American Gemological Laboratories (AGL), bringing together two of the most influential names in gem testing and certification and significantly strengthening global capabilities in coloured gemstones. The combined platform is designed to set a new standard for trust, transparency and consistency in gemstone certification across international markets.

“This is a transformational moment for our industry,” said Tehmasp Printer, Managing Director and Global Chief Executive Officer of IGI. “AGL’s leadership in coloured gemstone science, combined with IGI’s global scale, allows us to build a future-ready certification ecosystem—one that delivers reach and consistency without compromising scientific rigour. Together, we are raising the global benchmark for trust and transparency.”

The partnership is expected to accelerate AGL’s international expansion by leveraging IGI’s global infrastructure, enabling coloured gemstone certification services to reach markets beyond the United States. The acquisition is supported by Blackstone’s long-term investment strategy.

Founded in 1977, AGL is widely recognised for pioneering country-of-origin reporting for coloured gemstones in the United States. Its clients include leading luxury brands, prestigious auction houses, manufacturers, retailers and private collectors worldwide. The deal also deepens strategic ties between the United States, the world’s largest fine jewellery and coloured gemstone market and India, a major global hub for gemstone sourcing, manufacturing and certification. The combined organisation aims to meet rising industry demand for provenance, transparency and consistent global standards.