Laboratory Diamond Jewellery › 1.32Ct Platinum Lab Diamond Ring - IGI Certified - SQ3099714 Image 1 of 1 1.32Ct Platinum Lab Diamond Ring - IGI Certified - SQ3099714 $4,750.00 Platinum Lab Diamond Ring. IGI Certificate #602375402. Total Diamond Weight 1.32Ct. G Colour SI1 Clarity Add To Cart Added! Platinum Lab Diamond Ring. IGI Certificate #602375402. Total Diamond Weight 1.32Ct. G Colour SI1 Clarity