Grading & Certification

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 is seen only 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.