Purple skull with amethyst wire pierced earrings jewelry

Earrings are in good condition and kept in a clean smoke free home. The 6/8” X 5/8” X 4/8” skull did not register with my tester at all so I am not sure of the material, the 7mm round purple bead above it registered amethyst. The 5-7mm chips underneath the skull also registered as gemstones. It’s only the skull that did not. Approximate 2 3/8” dangle. #gemstone #earrings #purple