Gorgeous design - one I've never seen before! Appears to be rhodium plated. There are a couple of stones in this brooch that seem to be a slightly different color than the others, but I can't decide if this is just normal aging of the stones, the effect of my aging eyes, or if they might be replacements. Still a gorgeous item in excellent condition with no damage or plating loss that I can see. Marked on the back in an applied oval: WEISS. Measures approx 2 3/4" tall x 2" wide.