This is a very unusual sweetheart expansion bracelet. It has an open work center with a green translucent stone which might be chrysoprase. Every other link has and embossed design. It looks like stainless steel on the inside and gold filled on the outside but there are no markings for this. The links are tight and the center is 5/8" top to bottom. This is very small and was definitely made for a child. It will expand to fit a 6" wrist but I think it's a little tight. If you have a very small adult wrist it might be perfect for you. It is signed Co-Star and is in excellent condition. I don't see any problems with it.