Natural & Synthetic Mixed Gemstone Round Charms Bib Necklace with 304 Stainless Steel Chains, Chakra Necklace for Women, Size: about 15.63 inch(39.7cm) long+35mm extender, charm: 9.5x4.5mm.âPlease Note: These Gemstone Include Natural Green Aventurine & Amethyst & Lapis Lazuli & Red Jasper & Tiger Eye, Synthetic Turquoise.