These earrings are sterling silver crosses, about 5/8", set with marcasites and finished with a tiny flower in the center. The crosses are marked 925(sterling silver).
The ear wires shown are not sterling and do not seem to be original to the earrings. If these ear wires do not suit you, I am happy to replace them with any have in stock. I currently have pierced, non-pierced, vintage and new wires.
Sterling Silver Cross Earrings with Marcasites - Choice of Ear Wires