Sapphire and Diamond Ring with Milgrain Detail in 18kt White Gold. (D.1/4 carat weight, Sapp 3/8 carat weight) This item is a SEMI-MOUNT and it comes with NO CENTER STONE as shown but it will accommodate a 6.5mm round center stone.Metal Type: 18kt goldMetal Color: WhiteStone Type: Diamond - WhiteCenter Stone Shape: RoundStyle: Halo style Weight: 5.07Accent Diamond-Shape: Round Full CutAccent Diamond-Weight: 0.23