The letters R.D.I. spelled in loose diamonds beside a grader’s loupe

Inside the lab

R.D.I. is an independent diamond grading laboratory. Our graders work to the 4Cs, and the certificates they issue describe each stone in clear terms.

We assess every diamond to the best of our professional judgement. Each report is a technologically advanced evaluation that tells you more about your diamond, and it can add to its value.

Our graders

HRD Antwerp diploma: Certified Diamond Grader, awarded to Halas Dacian
Halas Dacian+40 720 275 172Certified Diamond Grader, HRD Antwerp
Gemological Institute of America diploma in Graduate Diamonds, awarded to Paolo-Antonio Luca
Paolo Antonio Luca+40 720 533 637Graduate Diamonds, GIA
Loose diamonds, a loupe and the R.D.I. stamp on a white grading surface

Put your diamond under our loupe.

Contact usCall +40 720 533 637