Laboratory Diamond Jewellery › 1.26Ct Platinum Lab Diamond Ring - IGI Certified - SQ1167242 Image 1 of 1 1.26Ct Platinum Lab Diamond Ring - IGI Certified - SQ1167242 $4,820.00 Platinum Lab Diamond Ring. IGI Certificate #814766223. Total Diamond Weight 1.26Ct E Colour VS1 Clarity. Add To Cart Added! Platinum Lab Diamond Ring. IGI Certificate #814766223. Total Diamond Weight 1.26Ct E Colour VS1 Clarity.