The GIA (Gemological Institute of America) are the world’s foremost authority on the certification of diamonds. The GIA is a nonprofit-making institute dedicated to research and education in the field of gemology and the jewellery arts. Founded in 1931, the GIA’s mission is to protect all buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.

The institute does so through research, gem identification and diamond grading services and a variety of educational programs. Through its world-renowned library and subject experts, GIA acts as a resource of gem and jewellery information for the trade, the public and worldwide media outlets.

Gubelin Laboratories in Lucerne, Switzerland, have forged a reputation as the preeminent body for the certification of Emeralds and other gemstones. Founded in 1850, they are one of the oldest and most highly respected certification institutions in the world.

IGL are based in Ramat Gan, Israel, one of the world’s busiest diamond markets. They are experts in the certification of gem stones and they also provide impartial valuations, a service that is valued by our clients.


“CDTEC´S professional team is specialised in very diverse and specific technological processes, which are fundamental in the assessment, tradition and authenticity of Colombian gems.”

Based in Bogotá, Colombia, and with their finger on the pulse of the fine emerald trade, CDTEC have developed a reputation at the forefront of gem certification.

WGI (World Gemological Institute)

“For over the past 30 years the World Gemological Institute (WGI) along with our team of expert Gemologists have build a solid standing reputation as one of the leaders in the Industry. Our appraisals and lab reports are recognised worldwide by insurance companies, retailers, private jewellers and wholesalers. We offer a number of different appraisals and comprehensive laboratory services to suit your needs.”