Very tough materials, best for gem stability (prongs do not bend or split quickly) Can be high priced Yellow sapphires can range in shade from greenish yellow to orangish-yellow and all the things in between. The popular yellow sapphire shade is usually a medium, lively, canary yellow. The Ceylon Yellow https://www.apsense.com/article/810029-some-historical-facts-about-sri-lankan-yellow-sapp.html