Colombian emerald and diamond ring, circa 1910.

Colombian emerald and diamond ring. Set to centre with a rectangular step cut natural Colombian emerald with minor oil in an open back claw setting with an approximate weight of 2.48 carats, surrounded by thirty four round eight cut diamonds in open back grain settings with a combined approximate weight of 0.34 carats, flanked further by eight round eight cut diamonds in open back grain settings with a combined weight of 0.08 carats. The total approximate diamond weight is 0.42 carats to an impressive angular cluster design featuring millegrain borders throughout, a pierced structural gallery and fancy shape open backholing with bead detail, leading to slightly raised shoulders with ridge detail and flowing through to a solid D-shape shank. Tested platinum, circa 1910, accompanied by SSEF report #154548.