Laboratory Diamond Jewellery › 1.40Ct Lab Diamond Studs. IGI Certified - SQ2649735 Image 1 of 1 1.40Ct Lab Diamond Studs. IGI Certified - SQ2649735 $3,690.00 sold out 18Kt White Gold Lab Diamond Studs. Total Weight 1.40Cts.IGI Certified D VS2 Sold Out Added! 18Kt White Gold Lab Diamond Studs. Total Weight 1.40Cts.IGI Certified D VS2