Square Halo Diamond Ring in 18kt White Gold. (D 1/2 carat total 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 stoneMetal Type: 18kt goldMetal Color: WhiteStone Type: Diamond - WhiteCenter Stone Shape: PrincessStyle: Halo style Weight: 4.5Accent Diamond-Shape: roundAccent Diamond-Weight: 42737