Jewelry › Platinum 2.52ct black opal and diamond ring Image 1 of 2 Image 2 of 2 Platinum 2.52ct black opal and diamond ring $20,000.00 Platinum ring featuring a 2.52ct black opal set with 0.54ct of diamonds. Size 9.25. RT82491 All weights are estimated Add To Cart Added! Platinum ring featuring a 2.52ct black opal set with 0.54ct of diamonds. Size 9.25. RT82491 All weights are estimated