Simon G. (American, 20th century). An 18k two tone white and yellow gold ring containing; one center GIA graded sapphire (approx. 5.40 ctw, grayish dark blue color, moderately high tone & intensity), twenty-eight (28) round fancy yellow diamonds (approx. 0.15 ctw), and one hundred and thirty two (132) full cut round brilliant diamonds (approx. 1.65 ctw, average color G/H, average clarity VS). Marked with maker and for 18k gold quality. US ring size approx. 7. Total weight approx. 13.6 grams. Note: a copy of the GIA grading for sapphire available upon request.