Adjustable Costume Jewelry Ring with Faux Lapis Stone

This item is a piece of costume jewelry, specifically an adjustable ring featuring a large, central faux gemstone. The ring is constructed from a non-precious base metal with a yellow-gold-tone plating. The central element is a rectangular, step-cut imitation stone in a vibrant cobalt or cornflower blue, possibly meant to simulate lapis lazuli or sapphire, though it lacks the natural inclusions or transparency of genuine minerals. The stone is held within a simple bezel setting. The band of the ring is wide and tapers toward the back, where it features an open, bypass-style adjustable shank, a common indicator of mass-produced novelty or fashion jewelry. The physical condition shows significant signs of wear and age; there is noticeable tarnish and pitting across the metal surfaces, particularly on the shoulders of the band where the gold finish has worn away to reveal a darker base metal underneath. This degradation suggests the piece is not made of solid gold. There are no visible maker's marks or hallmarks in the image, further suggesting it is a commercial-grade accessory likely dating from the mid-to-late 20th century. The overall craftsmanship is functional rather than high-end, utilizing industrial casting and stamping techniques.

I have virtually examined the Adjustable Costume Jewelry Ring featuring a faux lapis lazuli stone. Based on the provided imagery, the item is categorized as mass-produced fashion jewelry from the mid-to-late 20th century. The condition is graded as 'fair to poor' due to significant oxidation, pitting, and the loss of gold-tone plating, which reveals a non-precious base metal. The open bypass shank is a characteristic feature of low-cost, one-size-fits-all novelty items rather than fine or designer costume jewelry. Market demand for unmarked, non-designer costume jewelry in this condition is extremely low. Unlike 'signed' pieces from makers like Trifari or Monet, which carry collector value, this ring’s value is purely aesthetic and diminished by visible wear. Comparables found in secondary markets, such as bulk estate lots or thrift outlets, typically price such items under $10. The lack of natural inclusions, the presence of surface wear consistent with molded glass or plastic, and the industrial casting marks further confirm its status as a commercial accessory. Critically, a remote visual inspection has limitations. While I am confident this is costume jewelry, a physical examination would be required to confirm the base metal composition via acid testing or XRF analysis. I would also need to inspect the 'stone' under 10x magnification to definitively rule out low-grade dyed sodalite, though the uniform color suggests a synthetic simulant. No provenance was provided; however, given the lack of maker’s marks and the degree of metal degradation, documentation is unlikely to increase the valuation significantly.