Blackstone-owned International Gemological Institute files papers for Rs 4,000 crore IPO

US fund Blackstone backed diamond certification company International Gemological Institute (IGI) has filed draft papers with the capital markets regulator SEBI to raise Rs 4,000 crore ($480 mn) through an initial public offering (IPO). US fund Blackstone backed diamond certification company International Gemological Institute (IGI) has filed draft papers with the capital markets regulator SEBI to raise Rs 4,000 crore ($480 mn) through an initial public offering (IPO).  Economic Times