These rings are crafted with a naturally formed piece of elite shungite from Russia. This rare form of shungite has a shiny, metallic finish. Shungite is one of the oldest stones and is known for its many healing properties. These listing photos are examples of the range of natural variation these rings will have. Every stone is raw and uncut so each ring will vary slightly in shape, size, and color. By ordering this listing you will receive an assortment of average ring sizes, unless otherwise discussed (default sizes included will range from 4-10, but upon request can be made in US sizes 3-14) Please note that the raw copper on these pieces will age naturally over time. Some people may experience a green mark on their finger while wearing copper.