Such a cool rock! I loved it had a white strip on both sides so I cut out the back sheet sterling so you could see it. Set in fine sterling silver bezel, and second charm is sheet stamped sheet sterling. Sterling silver rolo chain is approx 18" in length and has sterling custom links and clasp. (they do give it a little more length). Oxidized and sanded finish. I left this chain with a little darker patina. If asked I can lighten a bit.