Square Black and White Diamond Halo Ring in 18kt White Gold. (D 1/4 carat weight and Blk. D1/5 carat weight) This item is a SEMI-MOUNT and it comes with NO CENTER STONE as shown but it will accommodate a 5.5mm princess cut center stone.Metal Type: 18kt goldMetal Color: WhiteStone Type: Diamond - WhiteCenter Stone Shape: PrincessStyle: Halo style Weight: 6.8Accent Diamond-Shape: RoundAccent Diamond-Weight: .49 (blk.21 carat, d.28 carat)