14 K Yellow Gold Opal Earrings Scalloped Edges

14 K Yellow Gold Opal Earrings with Pretty scalloped edges. I have had these a long time and they show normal wear. They are so pretty and have lots of life left in them. They are marked 14K on the stems. I’m unsure if the backs are 14K or not since my eyes can’t see them well enough. Measurements are approximate and colors may be off because of lighting. Since they are not new and have been used there may be other imperfections.