? Moissanite VS Diamond ? ? Moissanite Maintain Their Clarity & Sparkle Throughout A Lifetime Just Like A Diamond. ?Moissanites Are Actually More Brilliant (Sparkly) Than Diamonds With 2.65 Refractive Index- Diamonds Are 2.42. ? Moissanite Is Less Likely To Attract Grease Or Dirt Than A Diamond And Should Keep The ‘Sparkle’ Longer In Between Cleanings. ?Moissanites Have A Hardness Of 9.25 And Diamond Have 10 On The MOHS Scale Moissanite Are Extremely Durable. ?Due To Their Extremely Similar Properties, Moissanites Are Often And Commonly Mistaken For Diamonds.