How can I tell if an orange sapphire is real?

One of the best ways to tell if any orange sapphire is real is to give the gemstone a “breath test.” Breathe on the sapphire to create a fog — if the condensation clears up within a few seconds, the sapphire is genuine. You can also try the “scratch test” by scraping a key or coin across the sapphire’s surface. Sapphires are second only to diamonds on the Mohs Hardness Scale, so scraping shouldn't leave a mark on a real sapphire. Shop a collection of orange sapphire jewelry from some of the world’s top sellers on 1stDibs.