Diamond Testing Guide: 7 Ways to Spot a Fake in 2026 The Gem Identification Course at the Indian Institute of Gemology turns these seven tests from guesswork into genuine expertise, backed by decades of hands-on teaching experience in New Delhi. It’s the difference between hoping a diamond is real and knowing it is. https://iigdelhi.com/diamond-testing-guide-7-ways-to-spot-a-fake-in-2026/