International Gemological Institute aka IGI IPO GMP started. Stay tuned for the latest IPO GMP numbers of International Gemological Institute IPO. International Gemological Institute IPO GMP made a high of ₹156 of 21st December against a low of ₹100 that was on 10th December. International Gemmological Institute (IGI) IPO, which opened for public subscription on December 13, 2024, closes today. Find the latest subscription status, GMP, allotment and listing dates here. IGI IPO GMP today is +95. This indicates International Gemmological Institute share price was trading at a premium of ₹ 95 in the grey market, according to investorgain.com. Learn about the International Gemmological Institute IPO, a global leader in diamond certification and lab-grown diamonds. Find out the IPO dates, price band, grey market premium, financials, and more.