Proven Quality
Certification & Grading
Every OENLI diamond over 0.25ct ships with an independent IGI (International Gemological Institute) or GIA (Gemological Institute of America) grading report. The certificate records the stone’s 4Cs — carat, color, clarity, cut — plus measurements, symmetry, polish and fluorescence. It also confirms the stone’s origin as laboratory-grown.
We also laser-inscribe the girdle of every diamond with a microscopic serial number matching the certificate, so your stone can always be positively identified. Scan the QR code on your certificate to view your diamond’s grading report online.