18kwg Cocktail Swirl Microprong Diamond Ring. The total diamond count is 521 round calibrated hand selected pieces weighing a total of 5.13 carats. The band has a ring size of 7.25 and weighs a total of 19 grams. The front of the ring is 40mm long and 22 mm wide, while the back is 7mm long. You get free appraisal from retail value $33,000, which will state the diamond weight and quality.