Large emerald-cut gemstone cocktail ring

This piece features a substantial cocktail ring presented on a finger for scale, showcasing an oversized, emerald-cut or rectangular step-cut gemstone with a warm reddish-orange or deep amber hue. The stone is secured in a yellow-toned metal setting utilizing prominent double-pronged corners, which is characteristic of mid-20th-century costume jewelry or cocktail ring designs. The mounting appears to be cast metal with a polished finish, displaying structural ribbed accents along the shoulders. Due to the angle and lighting of the photograph, internal inclusions or specific facet arrangements are difficult to fully verify, and the exact material composition of both the stone and the metal remains unauthenticated without physical testing. There are no clearly legible maker's marks, hallmarks, or signatures visible from this perspective. The overall visual presentation aligns stylistically with vintage retro or mid-century fashion jewelry, though the possibility of a synthetic gemstone or colored glass cannot be ruled out from the image alone. The item exhibits minor surface wear consistent with age and handling, but overall structural integrity appears sound based on visual inspection.

Based on what I can see in the photograph, this piece presents as a vintage mid-century costume cocktail ring featuring a large, rectangular step-cut or emerald-cut gemstone in a warm amber or reddish-orange hue, set in a yellow-toned metal mounting with ribbed shoulders and double-pronged corners. I cannot verify from a photo alone the exact material composition of either the stone, which could be colored glass, synthetic spinel, or another simulant, nor the base metal alloy or plating of the setting. Furthermore, I am unable to locate any clearly legible maker's marks or hallmarks from this viewing angle. My valuation range of $150 to $300 assumes that the attribution to a mid-century fashion jewelry design is correct and that the piece dates to that era with its structural integrity intact, exhibiting only minor surface wear consistent with age. General market demand for vintage retro costume jewelry remains steady among collectors of period fashion pieces, though values are highly dependent on materials and condition. To confirm authenticity and material composition, an in-person physical examination, hallmark verification, and possible gemological testing would be needed. If the item were to turn out to be a modern reproduction, replica, or made 'in the style of' mid-century designs rather than a period piece, the value would likely decrease significantly, typically dropping to the $40-$80 range depending on the quality of the manufacture.