Art Deco Marcasite Sterling Enamel Earrings

I found these earrings a couple of months ago. They appear to be similar to a bracelet made by Theodor Fahrner's matte enamel oriental style collection. So probably made in or around the late 1920's. They are only marked sterling. They are gilded with matte blue enamel, and have amazonite and marcasites. 7/8" tall by 9 /16". Screw on type mount which I hate, I would lose them so fast. Have not see any quite like them.