IGL has developed a systems of Diamond Grading according to"International Rules for Diamond Grading" drawan up by" Diamond high Council" Antewrep a committee of "International Diamond Council". IGL agrees in many points with CIBZO Rules. For technical help, IGI is very much thankful to IGL, (A P Rules. For technical help, IGI is very much thankful to IGI, (A Project of Gems & Jewellery Export Promotion Council sponsored by the Ministry of Commerce, Govt. of India)