Certifications
Independent verification, every time. We never sell a stone without a report.
Our certifying laboratories
IGI
Verify ↗International Gemological Institute
Primary lab for our lab-grown diamond catalogue. Every diamond ships with its IGI report.
GIA
Verify ↗Gemological Institute of America
Used for select natural diamonds and gemstones.
GRS
Verify ↗GemResearch Swisslab
Origin and treatment certification for premium natural sapphires and rubies.
Gübelin
Verify ↗Gübelin Gem Lab
Origin certification for exceptional sapphires, rubies, and emeralds.
What a certificate tells you
- The 4Cs — cut, color, clarity, and carat weight
- Polish, symmetry, and fluorescence grading
- Exact measurements and proportions
- Lab-grown identification (for our diamond catalogue) or origin (for natural gems)
You can verify any report directly with the lab using the report number printed on the certificate and shown on our product pages.