Unison ring, By L.Greenwalt Jewelry Architectural statement ring sculpted & carved in wax by hand & cast via lost wax casting. Your choice of yellow bronze or sterling silver. Sizes are approximately 6, 7, 8 *bronze can sometimes leave a faint green mark after being worn. This isn't true for everyone, but if you do encounter this, do not be alarmed. It's simply the copper content of the bronze alloy reacting with the acids of your skin. If this does occur, simply wash hands after wearing.