Men's Black Onyx and Diamond Two-Tone Signet Ring

This is a men's ornate signet-style ring, likely constructed from 10k or 14k yellow gold with white metal accents (potentially rhodium plating or white gold). The central feature consists of a rectangular black onyx tablet inlaid with a white metal four-pointed star or kite-shaped setting containing a single round-cut diamond. The ring face is framed by a row of five additional round-cut diamonds set in a white metal channel along one corner of the square bezel. The shoulders of the band exhibit a heavy, textured 'brick' or geometric stamped pattern that lends a masculine, mid-century aesthetic. Based on the design, it likely dates to the late 20th century (1970s-1990s). The piece shows moderate signs of wear consistent with regular use, including surface abrasions on the metal, minor scratches on the onyx face, and a visible buildup of skin oils and debris around the settings and textured areas. The craftsmanship suggests a commercial production piece rather than a custom-made high-jewelry item. No maker's marks or hallmarks are visible in the provided image, though they would typically be found on the interior of the shank.

I have conducted a visual examination of the Men's Black Onyx and Diamond Two-Tone Signet Ring. Based on the design and construction, this piece is a classic commercial production item, likely 10k or 14k gold, dating from the late 20th century. The condition is categorized as 'good,' though moderate surface abrasions and debris indicate frequent wear. The value is driven primarily by its metal content and the popularity of the mid-century masculine aesthetic, though as a mass-produced piece, it lacks the rarity of bespoke jewelry. Market conditions for yellow gold men's rings remain steady, though the black onyx and 'brick' pattern shoulders are currently catering to a specific vintage niche. Comparables for similar commercial signet rings with small accent diamonds currently sell within the $400 to $700 range on the secondary market. Factors impacting value include the visible wear on the onyx face and the small total carat weight of the accent diamonds. Limited by the nature of digital images, I cannot definitively confirm gold purity or the authenticity of the gemstones. A full authentication would require an in-person physical inspection to locate hallmarks (typically found on the inner shank), a stone tester to verify the diamond's thermal conductivity, and a gold acid or XRF test to determine karat weight. Furthermore, a thorough cleaning and polishing would be required to assess if surface scratches on the onyx have compromised the stone's structural integrity or if they are merely superficial.