Moissanite, by Charles Winston, the most brilliant gem in the world set in 925 Sterling Silver with Platinum over. As hard as a Diamond, sparkles and shines more than a Diamond, bright white and perfect. Tests as a Diamond. The jewelry industries best kept secret. Moissanite Fire® 1.53ctw Diamond Equivalent Weight Round Platineve™ Ring - Size 6 Moissanite Fire® 1.53ctw diamond equivalent weight round, Platineve® ring. Measures 5/8" L x 3/16" W and is not sizeable. Actual moissanite weight is 1.48ctw. Comes with certificate of authenticity. Only one remaining! Make it yours.