Vintage Clip On Earrings Very Unusual Dark Gray Domed & Bumpy

Description

These earrings measure about 7/8". I am not sure of the material. Patchy brownish discoloration to the front - one more than the other. Rear has tarnish, marks, and signs of wear. Surface to rear ha some manufacturing imperfections. Preowned vintage earrings, sold as shown - I am unsure of material type(s) because of this. Pictures show different angles for you to review - while I attempt to note any defects, some tarnish/signs of wear may be visible that are not otherwise stated. Earrings are tested and photographed on a thin/smooth earring stand (not included) to show that the clips are in working order. Country of manufacture cannot determined.