R.D.I. is an independent diamond grading laboratory that guarantees high quality grading. Our graders work based on the 4 C’s issuing diamond certificates that clearly describes characteristics of the diamonds they are examining.

Every certificate we make is verified by at least two graders before being handed to our customers. One of our reports represents a technologically advanced diamond evaluation. It helps our customers know more about their diamonds and it can improve the value of a diamond.

R.D.I. will assess your diamonds to the best of our professional judgment.

R.D.I. reports represent the highest standard of reliability, consistency and integrity. Our reports are recognized internationally.