Certification & Authenticity

Every gemstone at GLI Gems can be supplied with an independent laboratory certificate. Where a certificate is available, you will see a "View Certificate" button on the product page. We work with certification labs recognised worldwide. Our reports include the gemstone identification, colour, clarity, cut, carat weight, treatment where applicable, and country of origin. If you would like a specific lab — GIA, IGI, GRS or any other — please write to us before checkout and we will arrange the report. Every purchase is packed with a signed authenticity slip from GLI Gems in addition to any lab certificate.