Size 7.25. Center stone 6.0mm by 3.0mm approx. 1/3 carat (.30 CT. to .36 CT). Band has 10 small round diamonds approx. .05 each for total of .50 carats. Mark 18K. Weight 4.8 grams. Total diamonds .86 carat approx. Beautiful ring with lovely bright white marquis diamond with 10 accent diamonds (5 on each side) set into the band. This marquis stone is a beautiful white clear stone . I could not find/see any black spots (carbon) under a 10x loupe. It is set in bright yellow 18K gold. The small round accent diamonds are bright and white as well and matched beautifully. This ring is lovely alone or would look great with a gold wedding band.