Art Deco Ruby and Diamond Filigree Ring

This is an elegant Art Deco style ring featuring a central marquise-cut ruby of a deep pigeon-blood red hue. The ruby is securely held in a two-prong setting atop a square-shaped platinum or white gold face. The surrounding setting is intricately designed with geometric filigree and openwork characteristic of the 1920s-1930s era. It is embellished with approximately fourteen small round-cut accent diamonds, pave-set to maximize brilliance against the white metal. The shoulders of the ring transition into a thin, polished band and are also accented with small diamonds within milgrain-edged borders. The overall craftsmanship displays high-quality hand-finishing, with delicate scrolling patterns and fan-like motifs visible in the metalwork beneath the central stone. Condition appears excellent with minor surface wear consistent with age; the stones appear securely set with no visible chips or fractures on the ruby's table. The style suggests an appraisal as a vintage or high-quality revival piece crafted to emulate the geometric sophistication of the Art Deco period.

Based on my visual examination of this Art Deco ring, I find it to be an exceptional example of early 20th-century period jewelry or a high-end contemporary revival. The central marquise-cut ruby displays the highly coveted 'pigeon-blood' red saturation, while the platinum-style mounting exhibits the precise geometric symmetry and openwork filigree synonymous with the 1920s. The milgrain detailing and hand-finished scrolling motifs suggest artisanal craftsmanship rather than mass production. Current market demand for authentic Art Deco pieces remains robust, with high-quality rubies significantly driving premiums at auction. Comparables for platinum ruby and diamond filigree rings of this caliber typically range between $4,000 and $7,000 depending on stone origin. However, several critical limitations exist in this visual-only assessment. While the condition appears excellent, I cannot definitively determine the metal purity (e.g., .900 Platinum vs .950) or identify if the ruby is natural, synthetic, or heat-treated without a binocular microscopic exam and spectroscopic analysis. Additionally, the accent diamonds require a diamond tester to rule out simulants. A full authentication would necessitate a geological laboratory report (such as GIA) to confirm the ruby's origin, as 'Burmese' provenance would nearly double the value. For insurance purposes, this item is valued at $5,350, assuming the center stone is a natural ruby with standard heat treatment.