Two-Tone Rectangular Cabochon Ring

The item is a men's-style signet or dress ring featuring a prominent central gemstone. The ring appears to be constructed from a combination of metals, likely a gold-toned material, possibly brass or gold plating, for the bezel surrounding the stone and the upper shoulders, contrasted with a silver-toned metal (perhaps sterling silver or white gold) for the main body of the band. The central gemstone is a polished, rectangular cabochon with rounded corners, displaying a dark, possibly black or very dark blue, color with subtle lighter inclusions or veining, suggesting a natural stone like black onyx, lapis lazuli, or a type of jasper. The bezel setting securely holds the stone within a raised, four-sided frame. The shoulders of the ring adjacent to the bezel are thick and appear to transition from the gold-toned metal to the silver-toned band, which features a ribbed or ridged design on its outer surface, extending around the visible portion of the shank. The overall design suggests a robust and substantial piece of jewelry. Visible condition issues include some surface wear, particularly on the gold-toned areas, which show minor abrasions or dulling. The silver-toned band also exhibits slight signs of wear consistent with regular use. The patina on both metals suggests it is not new, but no significant damage like deep scratches, dents, or chips in the stone are immediately apparent. The craftsmanship appears solid, indicative of a manufactured piece rather than a handcrafted one, possibly from the mid to late 20th century. The design is classic for a men's statement ring, exuding a vintage aesthetic. The mention of an 'identification number on the back' indicates there might be important maker's marks or purity stamps that are not visible in the provided image but would be crucial for a full appraisal.

Upon examining the provided image and description of this two-tone men's dress ring, I have conducted an appraisal based on its visible characteristics. The ring features a classic, robust design popular in the mid to late 20th century, combining a gold-toned bezel and shoulders with a silver-toned, ribbed band. The central stone is a dark, rectangular cabochon, preliminarily identified as black onyx or a similar natural stone. The overall condition is fair to good, showing signs of regular wear, including minor abrasions and dulling on the metal surfaces, consistent with its vintage. Without physical testing, the metals cannot be definitively identified; they could range from gold-plated brass and sterling silver to solid gold alloys. The value is significantly impacted by this uncertainty. The mentioned 'identification number' could be a maker's mark or metal purity stamp (e.g., '925' or '14k'), which would substantially alter the valuation. Comparable rings in sterling silver and onyx typically sell for between $75 and $200, depending on craftsmanship and condition. If the metals are determined to be base metal with plating, the value would be lower. For a conclusive appraisal, an in-person examination is required to test the metals, identify any hallmarks, and confirm the gemstone's identity. This report is a preliminary estimate based solely on visual information.