Art Deco diamond and sapphire ring

This is a delicate and intricate ring featuring a distinct Art Deco design aesthetic, displayed being held between a person's thumb and index finger. The physical characteristics include a central round-cut or European-cut stone, likely a diamond, bezel or prong set within a detailed filigree mounting made of a white precious metal such as platinum or white gold. Flanking the central stone are dark, rectangular step-cut stones, which appear to be calibré-cut blue sapphires accentuating the shoulders of the ring. The mounting exhibits openwork metal scrollwork, typical of the filigree techniques popular during the 1920s to 1930s. There are no visible maker's marks, hallmarks, or stamps discernable from this photographic angle; therefore, the identification rests entirely on the stylistic characteristics, geometric motif, and material choices consistent with the period. The condition appears well-preserved with some minor tarnish or patina visible in the recessed areas of the metalwork. No specific maker can be verified without physical inspection and examination of potential internal shank hallmarks. This piece exemplifies the fine jewelry craftsmanship of the early 20th century, though its precious metal purity and stone quality remain unauthenticated.

Based on what I can see in the photograph, this ring displays strong design characteristics associated with the Art Deco period, roughly circa the 1920s to 1930s. The piece features delicate openwork filigree mounting in white metal, housing a central round-cut stone—likely a diamond or early European cut—accented by calibré-cut blue stones that appear to be sapphires. However, I cannot verify from a photo the true nature of the gemstones, their carat weights, color, clarity, or whether the metal is platinum or white gold. There are also no visible hallmarks discernable from this angle. In-person examination by a professional gemologist, along with metal testing and gemstone analysis, would be necessary to establish the exact materials and origin. Assuming the working hypothesis that this is a period Art Deco ring crafted in platinum or 18k white gold with a natural central diamond and sapphires, typical market demand for comparable vintage pieces places its fair market value in the $1,200 to $1,800 range. The market for vintage Art Deco filigree rings remains consistently strong among collectors and bridal buyers. If physical inspection reveals the ring to be a modern reproduction, a contemporary piece 'in the style of' the era, or set with synthetic stones and silver-alloy metal, the value would be significantly lower, typically falling between $150 and $400.