IGI Certified Radiant Cut Lab Grown Diamond: . Diamond Details Shape Radiant Cut Carat Weight 0. 50 To 15. 00 CT Hardness 10 10 Type Lab Grown Diamond Certificate IGI & GIA Certificate SKU Radiant_Certified & : Refunds and cancellations are not applicable for loose diamonds. Customization prevents the option of stone exchange. Authenticity is ensured through a diamond tester video. Orders will shipped within 34 days after confirmation. It is important to carefully review the listing