Thermoset Plastic Necklace Clip On Earrings Set Gold Tone Red Costume Jewelry

Lovely clip on earrings and necklace set probably from the 1960s. I believe the "stones" are thermoset plastic glued into the settings, though they have a neat texture as if they were cut from stone. The set is in excellent vintage condition but is not signed and there are no maker's marks. The necklace is 16.5" long, and the earrings are about .75" x 1".