Product Details. Gemstones: 3mm Faceted Garnet. Base Metal: Stainless Steel. Coating: 14K Gold PVD Stainless Steel. Size: Adjustable 16-18 inches. Build your own charm necklace with this chain using our Charm Necklace Builder.. *This chain is sold separately and does not come with charms attached unless you use the Charm Necklace Builder.