Laboratory Diamond Jewellery › 1.59Ct Lab Diamond Studs - IGI Certified - SQ7516025 Image 1 of 1 1.59Ct Lab Diamond Studs - IGI Certified - SQ7516025 $3,650.00 18Kt Yellow Gold Lab Diamond Studs. Total Diamond Weight 1.59Ct E Colour VVS2 Clarity. IGI Certified. Add To Cart Added! 18Kt Yellow Gold Lab Diamond Studs. Total Diamond Weight 1.59Ct E Colour VVS2 Clarity. IGI Certified.