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. I try to find fairly thin rocks and I think you will find them to be much lighter than you would expect. Each piece is unique. This pendant is two concentric circles of small rocks of varying shades. The rocks are pinned and spin freely, kind of like a bearing. It is on a sterling rolo chain This sale is for this item pictured. I do make this style often, but each one is different and a different size. The chain measures approx 18 1/2 inches and the pendant is about 2 inches long. The chain length could be changed if need be. Please feel free to convo me if you have any questions.