Not sure honestly. These were sold to me as 925 Sterling Silver and they are stamped! I have been wearing a butterfly version for nearly a year and I still get constant compliments on it's beauty. I love these rings and I sell these for $17 each not sure what others sell these for as I sell all of my products at discount prices and when I can I put a few on Listia. I have had great reviews on them from all that have purchased or won. They are lightweight I know that.