About IGI - International Gemological Institute
https://www.igi.org/about/about-igi/
WEBThe world's leading independent diamond, gem and jewelry grading, education and appraisal institute since 1975. World Leader in Grading, Education and Accreditation. Grading and Certification. IGI grades more diamonds, gemstones and jewelry around the world than any other gemological organization. Learn More. Accreditation.
DA: 77 PA: 37 MOZ Rank: 55