Silver and Matte Black Onyx Choker / Necklace Vintage

Vintage silver and matte black onyx choker, unknown provenance. ***As with all vintage jewelry, I have not attempted to deep clean or polish this piece -- this is to avoid the possibility of damage to metals or stones (and because many who buy vintage jewelry prefer the patina's reminder that each piece has "lived"). I do wipe each piece with a clean, dry, lint-free cotton cloth before shipping to you. *** Thank you!