Emerald-Cut Three-Stone Costume Ring

This is a three-stone costume jewelry ring featuring a large central emerald-cut clear stone, flanked by two smaller square-cut accent stones. The central stone is held by a four-prong setting, while the side stones appear to be in basket or bar-style settings. The stones show a slightly muted brilliance, suggesting they are likely glass or high-quality cubic zirconia rather than diamonds. The metal appears to be a silver-toned alloy, showing significant signs of oxidation and patina, especially around the prongs and the base of the settings where the finish has darkened. There is visible wear on the facets of the main stone, indicating a softer material typical of vintage costume jewelry. The style is reminiscent of Art Deco or mid-century cocktail rings, likely dating from the 1950s to 1970s. No maker's marks are visible in the current view, but the overall construction suggests a mass-produced but classic fashion piece aimed at mimicking high-end fine jewelry from the mid-20th century.

I have examined the digital images of this emerald-cut three-stone cocktail ring. The central simulated stone and flanking square-cut accents exhibit a vitreous luster consistent with high-lead glass or early-generation cubic zirconia. I noted significant abrasions on the table facets and facet junctions, which indicates a low Mohs hardness rating, typical of vintage costume materials. The silver-toned mounting displays characteristic oxidation and 'greening' in the crevices of the basket, suggesting a non-precious base metal alloy with a thin silver or rhodium wash that has worn over time. Based on the prong construction and overall aesthetic, I estimate this piece dates to the mid-century period (c. 1950-1970). The market for anonymous vintage costume jewelry remains stable, though value is capped by the lack of a designer hallmark (such as Trifari or Eisenberg). Comparable pieces in similar condition typically realize prices under $100. Limitations: This evaluation is based solely on visual inspection of images. Without physical handling, I cannot perform a streak test, acid test the metal for sterling content, or use a refractometer to identify the stone composition. A definitive appraisal would require a loupe examination to search for micro-markings and a thermal conductivity test to rule out lab-grown synthetics.