|1 carat diamond rings are a sophisticated choice for an engagement ring. Ritani offers a range of one carat diamond rings to suit every taste and budget — each with its own characteristics and sparkle. Consider selecting a round cut diamond if you are looking for maximum sparkle. Add even more vintage sparkle by setting your 1 carat diamond ring in a French-set halo diamond ring. A halo setting will make your 1 carat diamond engagement ring appear even larger. Or choose a solitaire for your 1 carat diamond if you prefer simple elegance. 1 carat diamond rings are the most popular choice for engagement rings. Remember - cut quality will have the greatest impact on the beauty of your 1 carat diamond ring.