A vintage 14K yellow gold ring featuring a rectangular black onyx insert, crafted in the Art Deco or Retro style (circa 1920s–1940s). Key features: Insert material—rectangular black onyx (tablet cut or flat cabochon); the stone shows minor vintage wear typical of antique jewelry. Setting—a gold mount secures the stone with neat top and bottom tabs, leaving the side edges of the stone exposed. Shank and shoulders—the shoulders are adorned with a raised decorative pattern featuring botanical (leaf) or geometric motifs, a style characteristic of jewelry from the first half of the 20th century.