An emerald and diamond ring

An emerald and diamond ring, early 20th century, of toi et moi design, set with a circular-cut diamond weighing approximately 1.50 carats, and a step-cut emerald weighing approximately 1.40 carats, to sinuously curved shoulders set with smaller circular-cut diamonds, mounted in platinum, size L, case

Accompanied by GCS report no. 5783-578, stating that the emerald weighing approximately 1.40 carats is of Colombian origin, with indications of minor clarity enhancement