What a certificate actually is
A diamond certificate — or grading report — is a document from an independent gemmological laboratory that records a diamond's precise characteristics: the 4Cs, exact measurements, proportions and any treatments. Crucially, it's issued by a neutral third party with no stake in the sale, which makes it objective.
IGI & GIA — the labs we trust
Every Renaissance diamond is certified by IGI (International Gemological Institute) or GIA (Gemological Institute of America) — the two most respected names in the industry. GIA literally invented the 4Cs grading system; IGI is the world leader in grading lab-grown diamonds. Both are renowned for consistency and integrity.
What's on the report
- Carat weight — measured to the hundredth of a carat
- Cut grade, plus polish and symmetry ratings
- Colour grade on the D–Z scale
- Clarity grade with a plotted map of any inclusions
- Measurements & proportions — depth, table, girdle and more
- Confirmation that the diamond is laboratory-grown
- A unique report number, often laser-inscribed on the girdle
Why it matters
- Confidence you're paying for the exact quality described — not a guess
- An apples-to-apples way to compare two diamonds honestly
- Essential documentation for insurance and appraisal
- Protection of your diamond's resale and upgrade value
Every Renaissance diamond ships with its full IGI or GIA report, and its report number is laser-inscribed on the stone — so you can independently verify your exact diamond at any time.