Diamond Element Properties Figure It Out! Which One You Would Like To Go With It. Moissanite Diamond Lab Grown Diamond Natural Diamond Mining Mining Free Mining Free Mining Eco-Friendly Yes Yes No Refractive Index 2.65-2.96 2.42 2.42 Hardness 9.25 - 9.50 10 10 Conflict Free Yes Yes May Be Fire 0.104 0.044 0.044 Luster 20.40% 17.20% 17.20% Toughness Excellent Excellent Excellent Durability Life Time Life Time Life Time Certificate IBIZJEWEL IGI / GIA IGI / GIA Price $ $$ $$$$