To check gem purchases are the real deal, and to receive an authenticity certificate, you can deposit your gems at the gem-testing laboratory between 10am and 4pm, then return the following day between 4pm and 5pm to pick up the certificate. The service costs ₹1050 per stone, or ₹1650 for same-day service, if deposited before 1pm.
Gem-Testing Laboratory
Jaipur