Vintage Taxco Sterling Silver & Onyx Pendant w/ 18” Herringbone Sterling Chain

This beautiful Taxco Sterling & onyx pendant I make a perfect simple pair. The herringbone chain is Sterling from Italy, and measures 18” in length. I tried to buff slightly, obviously not perfectly but I did not polish. The pendant has an oval onyx surrounded by 925 sterling silver. Markings on both items should be visible in photos. Questions and offers welcome. We are a smoke free home. Thank you for your time.