Silver 925 Blue Opal Earrings Materials: Silver 925, Opal, Cubic Zirconia (925 stamp on post, catch, and motif) Silver polished and sterilized These are blue opal earrings made of Silver 925. I purchased them from a gemstone shop about 10 years ago and wore them several times during the first year, but I started using body piercings and have kept them stored away since then. I don't think I'll use them anymore, so I'm putting them up for sale. Please refrain from purchasing if you are sensitive to used items.