Laboratory Diamond Jewellery › 0.65Ct Lab Diamond Stud Earrings. IGI Certified - SQ3053721 Image 1 of 1 0.65Ct Lab Diamond Stud Earrings. IGI Certified - SQ3053721 $1,595.00 sold out 18Kt White Gold Lab Diamond Studs set with a total Lab Diamond Weight of 0.65Ct. EVS2. IGI Certified. Sold Out Added! 18Kt White Gold Lab Diamond Studs set with a total Lab Diamond Weight of 0.65Ct. EVS2. IGI Certified.