Topaz, Diamond, Platinum Ring The ring features an emerald-cut topaz measuring 16.15 x 9.78 x 6.95 mm and weighing approximately 8.70 carats, accented by full and parallelogram-shaped diamonds weighing a total of approximately 0.90 carat, set in platinum. Gross weight 9.10 grams. Size: 4-3/4 (sizeable)