Art Deco Platinum Diamond Solitaire Ring. Art Deco circa 1930. Platinum marked 900 PLAT IRID. Claw set in a millegrain decorated square setting a single old cut diamond. Diamond measures approximately 1 carat. Diamond G Colour, VS Clarity. Complemented by pierced out decorative mount. Pierced out gallery. Filigree decorated half band shoulders with a single set diamond to each side. Plain band shank.