Mokumé Gane, meaning wood-grain metal in japanese, is an ancient form of metal-smithing first developed by Japanese sword-smiths who made samurai swords and hilts out of varied alloyed steel. This mokume is composed of sterling silver, copper and brass. The process begins by kiln-fusing 5 alternating layers of the copper and brass together and then, once removed from the kiln, forging them to increase the bond.