This unakite stone necklace is on a 16 inch copper chain , treated not to change colour. The stone is about 3/4 inch in width and length. It also has a two inch extension to be worn up to 18 inches long. This chain is a little thicker than the small link chain that I usually use. Unakite is not only beautiful with it's mossy green and pink colour it is also said to balance the emotions.