An iconic shape, the round brilliant’s facets are designed for maximum sparkle. A near-colorless or colorless grade is advised if you intend to select a white metal, like white gold or platinum. The faint yellow in K or L graded diamonds is balanced by a yellow gold or rose gold setting. Setting your 1-carat round cut diamond in a French-set halo, or a band with vintage accents, will add sparkle and stylish details.