Sterling silver base with patina. 22k yellow, 14K green, and rose gold and mokume gane overlays. Mokume gane is in wood grain patterning made from18k green gold,14k rose & white gold and shakudo. The stripe patterning is made with sterling silver and shadudo. The shakudo is a gold and copper alloy. Stone: 2.5mm square sapphire set in 18k yellow. Pendant chain not included in price.