Art Deco Platinum and 0.65 Carat Diamond Ring

A striking reflection of the early Art Deco period, this circa 1920 platinum diamond ring embodies the bold sophistication and modern spirit that emerged in the years following the First World War. Crafted in platinum and stamped “10% IRID PLAT,” the ring represents the era’s embrace of platinum-iridium alloys, prized for their exceptional strength and durability, which allowed jewelers to create finely detailed settings with remarkable precision.

At its center rests an old European cut diamond weighing approximately 0.65 carat, graded K color and VS2 clarity. Hand-cut during a transitional moment in diamond craftsmanship, the stone displays the romantic brilliance and soft scintillation characteristic of antique diamonds, designed to glow beautifully beneath candlelight and early electric illumination alike. Four single-cut diamonds accent the composition, adding subtle sparkle and symmetry in keeping with the emerging geometric aesthetic of the Art Deco movement.

The 1920s marked a dramatic shift in jewelry design, as the delicate naturalism of the Edwardian era gave way to cleaner lines, architectural balance, and a fascination with modernity influenced by Parisian design, industrial progress, and the machine age. This ring captures that evolution beautifully, uniting timeless elegance with the streamlined refinement that would come to define one of the most celebrated design periods in jewelry history.

• Circa 1920

• Platinum, stamped “10% IRID PLAT”

• 1 old European cut diamond weighing approximately 0.65 carat, graded K color, VS2 clarity, accented by 4 single cut diamonds weighing approximately 0.10 carat total weight, graded F-G color, SI-I clarity

• Size 7, resizable

• Estimated gross weight: 3.2 grams

• Good vintage condition, wear in the form of minor scratches, one side diamond chipped, wear on side diamond facet junctions, wear appropriate with age