One-of-a-kind, hand cut mokume gane pendant.  Mokume gane is a metals technique which fuses several layers of differently coloured precious metals together to form a sandwich of alloys called a "billet." The billet is then manipulated in such a way that a pattern resembling wood grain emerges over its surface. [from Wikipedia]  In this case, copper with silver in a repeating bullseye pattern.  The pendant measures 3/8 x 1 1/2" and hangs on an 18" sterling silver necklace.
 
The artist, Stacey Maddock, reserves all copyrights on this work.  Reproduction of any kind is strictly prohibited.