Art Deco Cameo screwback earrings and Brooch set in 10k gold.

The key identifier here is thecrescent moon resting on top of her hair. This signifies that the subject isDiana (the Roman goddess of the hunt and the moon, known as Artemis in Greek mythology). Based on the style of the filigree border, the safety clasp, and the stamping, this piece likely dates from the1920s to the 1940s.