9.92 Round Brilliant Cut Diamond Eternity Ring in Platinum9. 92 Round Brilliant Cut Diamond Eternity Ring in Platinum. This modern eternity ring features 9. 92 carats of sparkling diamonds finished in platinum. Eight (8) . 60 carat and sixteen (16) . 32 carat diamonds are prong set around the ring. Each diamond is near colorless, with touches of soft warmth or lighter hues to bring an added dimension to the intense sparkle. The diamonds are Round Brilliant cut, bringing the maximum amount of fire and