Vintage black clip on earrings statement clip-ons faceted black stone gothic mourning jewelry midcentury unique costume jewelry gift for her

Striking black clip on earrings. Gorgeous lightweight oval stones, faceted at the front edges and polished to a high shine. I am unsure of the material - they appear to be of a natural organic material - see the dull grainy texture at the unpolished edges. These are very lightweight; they are not glass. Approx 1.25 x 1 inch or 32.7 x 24.8mm Good vintage condition. Light surface wear and a couple of small flea bite chips at the facets. The silver tone metal has dulled. There is some visible glue