I've always loved rivets. And lots of texture. Years ago I made a set of wedding bands where I riveted 2 bands together with 6 tube rivets evenly spaced all the way around. The inner band was silver and the outer was brass. I used silver tubing as the rivet to contrast against the brass. They turned out really cool but I learned that you have to shape the metal into a round ring first, then rivet through the bands.
So here's another take on the tube rivet using brass tubing on sterling silver sheet that I carefully pounded using two different striking heads.