This bangle is oddly fascinating to me. It is shiny like silver but darkly patinated, flashing light on a line of waves that washes along its 9-1/2 inch perimeter. (It's about 7-1/2 inches on the inside.) From some angles, the bracelet looks like it has spikes, horns or ruffles. Other times, I don't know what I'm looking at. Its irregular surfaces make it a category nonconformist, strange and wonderful. On a practical level, it's also smooth bangle to pull on and comfortable to wear. Heavy enough to matter, but light enough to not be bothersome. Its ragged surfaces gleam with a charcoal luster. There is no hallmark, but the dealer identified it as silver, and I polished a bit of the inside to be sure. I believe it's an electroform design, sterling over a resin form to give it an unusual shape. Note two holes, covered up, used in the casting process. Hollow inside. It's a pretty dang cool piece of jewelry. Someone please buy it so I don't keep it in my overstuffed collection.