VINTAGE CAMEO Sweet Splendors Clip-on Earrings

This is a pair of splendid, stunning Cameo vintage clip on earrings. I find it interesting that they are not exactly the same. ;) No Maker's Mark found. Unsure of what stone these are carved from or if it is something like a resin, or celluloid? All of my vintage is from my private family collection. ;) The Cameo on this is super sweet.