This piece is made with stones from Lake Superior and sterling silver. The silver is oxidized to get the grey color. All links are soldered shut. These stones, along with all the stones in my jewelry, have been found by my husband and myself at Lake Superior. Yes, we spend a lot of time at the beach! The majority of these rock are basalt. We may have drilled or cut them but otherwise they are un-altered and untreated. They will absorb some of your oils and deepen in color and take on a beautiful sheen. Each piece is unique. This bracelet has 10 rocks of varying colors pinned inside circles. It has a toggle clasp. This sale is for this item pictured. I do make this style often, but each one is different and a different size. I have several of this style available, and I’m working on getting them up here, but if you want to see other options, please convo me. It measures 8 1/2 inches from end to toggle. But i would say the inside diameter, as best i can measure, is 7 1/2 inches. It is for a medium to large wrist. I have a 7 inch wrist and it fits me well. It can be shortened if needed. Please feel free to convo me if you have any questions.