Men's Vintage Black Star Sapphire and Diamond Signet Ring

A substantial men's signet-style ring crafted from a silver-toned metal, likely sterling silver or white gold. The center features a high-domed, oval cabochon-cut gemstone that appears to be a black star sapphire, exhibiting a dark, opaque body color with potential asterism. The stone is held in place by four robust corner prongs. Positioned directly above the primary stone is a small, round brilliant-cut accent diamond or white stone set into a triangular, recessed geometric motif. The shoulders of the ring are highly textured with a cross-hatched or 'nugget' style engraving that adds a rugged, industrial aesthetic. The overall construction is heavy and masculine, indicative of Mid-Century Modern or late 20th-century jewelry design (circa 1960s-1980s). Visible condition issues include significant fine scratching and scuffing across the metal surfaces (pitting and surface wear), which is common for a piece of this age worn daily. There is a visible patina or oxidation in the recessed areas of the textured metal, highlighting the geometric details. No maker's mark is visible from this angle, but the craftsmanship suggests a mass-produced yet durable jewelry piece characterized by bold lines and mixed textures.