Vintage .925 Mexican Large Sterling & Onyx Pendant with Sterling Chain

Statement sterling and onyx pendant on an 18" sterling chain. Weighs 18 grams, including chain and stone. In very good vintage condition, artisan made so not machine perfect, but no damage and the onyx stone is flawless. Cabachon, black onyx, mineral stone, Mexican silver, vintage jewelry, silver necklace, Boho, Bohemian, Southwest.