Laboratory Diamond Jewellery › 1.50Ct Oval Cut Lab Diamond Ring - IGI Certified - SQ9462527 Image 1 of 1 1.50Ct Oval Cut Lab Diamond Ring - IGI Certified - SQ9462527 $4,950.00 18Kt White Gold Oval Cut Lab Diamond Ring. IGI Certificate #594318445. F Colour VS1 Clarity. Total Diamond Weight 1.50Ct. Add To Cart Added! 18Kt White Gold Oval Cut Lab Diamond Ring. IGI Certificate #594318445. F Colour VS1 Clarity. Total Diamond Weight 1.50Ct.