.40 Old Mine Cut Diamond & Sapphire Ring in Platinum. This sapphire and diamond ring is a stunning beauty! The center stone is a .40 carat old mine cut diamond. The diamond has a delicate warmth that complements the six (6) .012 carat Round Brilliant diamond accents. Fourteen (14) .04 carat French cut blue sapphires halo the center stone. The sapphires are bezel set in a platinum mounting with milgrain engravings. From the profile, a supportive and stylish basket mounting holds the collection of center stones. This piece would make a lovely engagement ring or can be worn on the right hand.