Loose Lab Diamonds › Radiant Cut | 1 ct | D VS1 | IGI Certifed Image 1 of 1 Radiant Cut | 1 ct | D VS1 | IGI Certifed $280.00 Radiant shape lab grown diamond. 1 ct, D color, VS1 Clarity. IGI Certified. All sales are final. Quantity: Add To Cart Added! Radiant shape lab grown diamond. 1 ct, D color, VS1 Clarity. IGI Certified. All sales are final.