Natural Gemstones, Specializing in Sapphire & Original Designed Gemstone Jewelry. Simply Sapphires was formed by people who love and admire gemstones. We’ve been online selling only natural stones since July of 1998. All of the stones in our inventory and on our site are natural. NOT one stone is man-made, lab created, or artificial. Our sapphires are not irradiated, diffused, glass filled, oiled, synthetic - and some are not even heat treated (about 95% of sapphires in the markeplace are heat treated to enhance color and/or clarity).