2Jewellerymen's copper bracelet, 3-Pack volcanic stone bead bracelets: This bracelet set is made of a combination of volcanic stone and brass. The retro texture is used to make it old, and the hardness of the brass is finally lost to careful polishing. The material of the product is solid brass. The surface has undergone an old texture process. Therefore, the parts in contact with the skin will show the oxidation color of brass. It is easy to oxidize and blacken when exposed to humid air for a long time. However, it can keep the light when worn. Please don't leave it in the "washroom" for a long time, because it will be excessively damp for a long time, which will easily save the green patina. Instead, please wipe off the patina with a coarse cloth and rinse with water.