Old mine diamond solitaire ring. Set to centre with a cushion shape old mine diamond, K colour, SI1 clarity, with a weight of 1.51 carats, in an open back rubover setting, to an impressive solitaire design featuring a solid gallery and open backholing, leading to intricately carved shoulders with grooved details which flow through to a solid D-shape shank. Tested yellow gold, circa 1890, accompanied by Gemological Institute of America (GIA) report #6432562669.
