Sterling Silver Sheet with hand sawed circle back cut outs. It reminded me of portholes or one of those pools that has the circle see thru windows. Either way I love to be able to show through the sea glass. This one is like looking underwater! I also stamped & etched the sides of the fine sterling silver bezel. Sterling silver rolo chain with custom clasp, chain measures approx 21" long + clasp. This pendant measures approx 1 1/2" long and 1/2" wide. I went with a longer chain than normal with this pendant, just seemed right. Oxidized and sanded finish