Lady's 18K White Gold Oval Cut Emerald and Diamond Ring. Ring Size: 7 (Can be Resized to Fit Most Any Finger) Contains: One Natural Oval Cut Columbian Emerald. Weight Approx: 1.20ct, Origin: Columbia, Color: Green. 42 Natural Round Brilliant Cut Diamonds. Weight Approx: .50cttw, Color: G-H, Clarity: VS. A charming and petite, natural Columbian emerald that would please any Princess. Emeralds have long been popular and the color of life. At the reasonable price that we are offering it for sale, I would consider it an investment.