Laboratory Diamond Jewellery › 3.25Ct Solitaire Lab Diamond - SQ6022478 Image 1 of 1 3.25Ct Solitaire Lab Diamond - SQ6022478 $11,900.00 sold out 18Kt White Gold Lab Diamond Ring. Total Diamond Weight 3.25Ct IGI Certified H SI2 Ex Ex Ex, cut, polish and symmetry. Sold Out Added! 18Kt White Gold Lab Diamond Ring. Total Diamond Weight 3.25Ct IGI Certified H SI2 Ex Ex Ex, cut, polish and symmetry.