Sterling Silver, Gold Plated, & Blue Opal Post Earrings

Sterling Silver post earrings with a design of four circles gradually getting larger. The top and third circle are blue opal, and the second circle is gold plated. Stamped: 925 & 925 on the backs Sterling Silver tested with an acid test. Most jewelry items are not tested, unless it is specified in the listing that it has been tested, all other items are described only by the stamps and markings, which I am happy to show pictures of.