Diamond Grading Process

IGI has received ISO 17025 accreditation for both natural and laboratory grown diamond grading. With 50 years of expertise, the 17025 certification is widely considered the most important standard for calibration and testing laboratories around the world.

The 5th C: Confidence

Diamond grading at IGI follows a strict sequence of intake, analysis and reporting to ensure the highest standards of security, anonymity, accuracy and consistency.

Anonymous Unique Report Number

Diamond grading is entirely anonymous. Upon arrival to IGI, every diamond receives a unique auto generated IGI identification number. To ensure neutrality and objectivity all owner information is masked. The IGI identification number, exclusively, is seen by graders. The diamond returns to central control following each stage of grading, to randomize the gemologists who examine it. After grading the unique report number becomes the official IGI grading report number, accessible with the Verify Your Report feature.

Compulsory Screening

IGI performs the industry’s most advanced screening and detection services on every diamond, gemstone and jewelry item submitted for analysis. State of the art technologies are used to determine naturally occurring, laboratory grown or simulant origin. The world’s most prestigious brands rely on IGI as their authoritative resource for authenticity and quality assessment of diamonds and gemstones of all categories, classifications and weights.