Art Deco solitaire diamond ring. Set with a central round old cut diamond, I colour, SI1 clarity, with a weight of 4.17 carats in an open back corner claw setting, within a structured square openwork collet with pierced pattern motif, conforming to the finger and supported by elegant curved slightly raised diagonal shoulders, leading to a solid D-shape tapered shank. Tested platinum, circa 1935, accompanied by HRD report #12031305001.
