Handmade brass bracelet. The pattern is based on that of intersecting water waves, like the ripple pattern produced by multiple raindrops falling onto a puddle. To produce this design I had to develop and fabricate a whole series of special tools. The material is uncoated brass. It will slowly oxidize with time, producing a beautiful rich patina. If you desire, however, you can easily restore its brighter color by rubbing with a jeweler's cloth, which is included.