Shree Samarth Dental clinic Teeth Jewelry are glass crystals, real 18k white gold and 24k or 22k yellow gold jewels, designed specifically for dental use. The crystals have a special coating on the back and their facet cut reflects the light and makes it sparkle like a diamond. Unlike earlier methods which involved drilling and setting the jewel into the tooth, a little bit of dental composite material will attach the crystal onto the teeth and last up to a year or longer.