This necklace features a raw piece of Black Tourmaline, the October birthstone, captive between two strands of 14k Gold Filled. With the captive stone necklaces, you never have to worry about your stone moving and the clasp finding it's way next to your pendant, everything stays in place The Gold Filled chain used for this is particularly dainty, with each link in the chain being less than 2mm. Total length of this necklace is abut 17 inches. It will arrive in a pretty box ready to be given as a gift. The appearance of stones may vary from the picture as all stones used in my pieces are natural and natural gemstones vary in color and shape. It is made with Rose Gold, which is allergy friendly to most people with metal allergies.