This necklace is approx 9 inches long and 10 inches with the stone. It is black stone that is has been polished, unfortunately I don't know what kind it is. I wire wrapped it myself and hand strung the black Jasper. This necklace can be shortened or lengthened or a charm added to it. I currently have wings, dragon, pheonix, tree of life, trinity, and goddess. Please make sure the charm is in stock before ordering. If you have any questions please ask. If you are looking for a particular stone please ask I may have it or can get it for you.