Vintage Black Stone Ring with Gold-Tone Setting

This item is a vintage-style ring featuring a large, vertically oriented, matte black stone, likely onyx or a similar material. The stone is carved or molded into a rough, elongated oval or marquise-like shape with a raised, organic element at its base that appears to be integrated into the stone itself or attached as a separate component. It is secured in a classic six-prong setting made of yellow gold-toned metal. The metalwork shows a polished finish but also displays signs of significant wear and oxidation, particularly around the prongs and the band's connection points. The craftsmanship reflects an mid-to-late 20th-century aesthetic, possibly 1960s-1970s, characterized by bold, sculptural designs. Notable condition issues include visible surface grime on the stone, minor abrasions to the matte finish, and noticeable tarnishing or loss of the gold plating on the metallic components, suggesting it is likely gold-filled or costume jewelry rather than solid gold. The overall construction is sturdy but shows the patina of age and frequent use. There are no maker's marks visible in the current image, though such markings may exist on the interior of the shank.