YELLOW SAPPHIRE GemShoppy March 9, 2015 Gemstones Sapphires are commonly worn as jewellery. Sapphires can be found naturally, by searching through certain sediments or rock formations, or they can be manufactured for industrial or decorative purposes in large crystal bowls. Sapphires are used as a medicinal effect for intellect. It was believed that if you would like to be clever; frequently lick with the tongue in a sober state a sapphire. The gemstones warmth and power combined with the moisture would expel warm full juices that affect intellect and man will attain good intellect. Sapphires were also believed to cure eye infections and inflammation in the eye. Sapphire is the traditional birth stone for April and the stone for Wednesday. It is the zodiac sign for Sagittarius.