Teething Bling® Gemstones hang on a black, silky cord with breakaway clasp. This necklace is made for an adult to wear but is safe for curious babies to handle and chew. Teething Bling® Gemstones are made from a medical-grade, chemical-free silicone. Many fun colors in gemstone shapes to entertain baby. Colorful, stylish & practical Smart Mom Jewelry.