Every Lumeniri engagement ring center diamond is certified by either the Gemological Institute of America (GIA) or the International Gemological Institute (IGI)—trusted authorities in diamond grading. Each diamond is laser inscribed with a unique certificate number, so you can verify its authenticity anytime.

You can look up your certificate here:
GIA
IGI

For most lab-grown diamonds outside of bridal, we work exclusively with IGI-certified DEF colorless, VS+ clarity stones—carefully selected for maximum brilliance and beauty. If you're designing a custom piece, we’re happy to source a certified diamond that meets your exact preferences.

Prefer a second opinion? You’re always welcome to have your diamond inspected by a trusted local jeweler.