7 Carat Radiant Diamond Engagement Ring. Radiant is the perfect word to describe this diamond. Sure to impress, the beautiful center diamond is H color and SI1 clarity and has an excellent cut. Set in a platinum talon-prong mounting in custom diamond band with .40 carats of G-H VS round brilliant diamonds. Rings like this and many more are crafted and designed in our Newport beach showroom north of Laguna Beach and west of Costa Mesa.