ROUND Forever Brilliant 1.76 ct Retrend Design. Round Moissanite With Certificate of IDT. All Moissanite weight are approximate we sell as a MM Size . Every Day USE Never loose shine and Luster. as Hard as Diamond because Mohs scale hardness is 9.25 so this is second hardness martial on the earth. Diamond is a pure carbon this a silicon carbon. NOTE : This is IDT Certified This is A 100% Genuine Moissanite Certified By IDT which is a big worldwide lab for diamond and precious stone testing . you can check your certificate through online company website Institute of diamond Trade.