These earrings are somewhat older, probably 20-40 years old. They are not marked but appear to be sterling silver. There is some etching on the outer loops, and the green stone is probably glass. They are the earrings pictured in the upper right of the photo below.
Please be aware that these earrings are handmade. The ear wire is somewhat larger than for commercially produced examples, and there is a handmade closure hook at the end of the ear wire. For these reasons, a somewhat larger ear pierce is necessary.