International Gemological Institute (IGI) shares rallied 10% to Rs 352.50, hitting a 10% upper circuit on NSE during Thursday's trading session after the company reported strong financial performance for the September quarter of FY27, with consolidated revenue rising 31% year on year, and profit after tax (PAT) surging 43%.International Gemological Institute Ltd., one of the world's largest independent grading and accreditation services providers, reported robust growth across its business segments for the quarter and half-year ended September 30, 2026.