The lab's mission is to take the guesswork out of buying diamonds or a precious stone. EGL clients are professional wholesalers, retailers, manufactures and craftsman in the diamond industry. EGL does not sell diamonds or gems nor do they evaluate and are totally independent of any diamond sales organization.

The diamond certificate records all the relevant information pertaining to the diamond, including carat weight, color grade, clarity grade, measurements and physical properties as well as plotting diagrams.

The President - Guy Margel - obtained his diploma in Gemology in 1969 at the American Gemological Society. In 1974 he returned to Belgium and opened the first gemological institute in Antwerp, known today as E.G.L. Guy Margel has subsequently opened laboratories in the following cities: