World Gemological Institute

The World Gemological Institute (WGI) is established to provide professional, precise and efficient gemological services to the global jewellery industry with our innovative laboratory located in the heart of London’s Diamond District, Hatton Gardens.
Our goal at WGI is to accurately identify, grade and evaluate diamonds, gemstones, pearls and jewellery; distinguish if they have been treated prior to your purchase, and determine the origin and authenticity. 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 our customers’ needs.