Vintage-Style Diamond Ring Set in Presentation Box

This set features what appear to be five white-metal rings (possibly platinum, white gold, or silver) set with clear, round brilliant or Old European cut stones consistent in appearance with diamonds or synthetic substitutes. The design features mid-century or Art Deco stylistic elements, including illusion settings, geometric box-style mounts, and decorative side accent stones. One ring set on the left appears as a multi-stone cluster or tiered engagement-and-wedding combination; the middle ring shows a prominent central stone framed in a square border; the ring pair on the right includes a single center stone with stepped baguette or round accents accompanied by a fitted, engraved band. The rings are presented in a fabric-lined box marked with text reading '429-431 WOOD ST. PITTSBURGH, PA.' on the inner lid and 'Registered Jeweler American Gem Society' embossed along the front lip. No internal metal stamps or purity marks are directly visible in the image, so full material composition, carat weights, and precise maker attribution remain unverified without physical inspection.

Based on what I can see in the provided image, this lot consists of three vintage-style white-metal ring sets featuring clear round and accent stones, housed in a retailer presentation box marked for the American Gem Society and a Pittsburgh, PA location. The design elements, including illusion settings, geometric mounts, and fitted bands, are characteristic of mid-20th-century jewelry design. Because I am examining this set from a photograph, I cannot verify the exact metal purity (such as 14k/18k gold or platinum) or the gemological properties of the stones, which could range from natural diamonds to synthetic substitutes or zircons. Assuming the mountings are precious metal and the stones are natural diamonds of modest commercial quality, comparable vintage ring sets typically realize between $1,200 and $2,500 in the secondary estate market. Collector interest in mid-century bridal sets remains steady, particularly when accompanied by period retailer packaging. To establish a firmer valuation, an in-person examination by a qualified gemologist is required to perform specific gravity testing, metal acid/XRF analysis, and microscopic diamond grading. Should physical testing reveal the mountings to be base metal or silver, or the stones to be non-diamond substitutes, the fair market value would adjust significantly downward to a costume or decorative range of approximately $100 to $300.