Square Halo Diamond Ring in 18kt White Gold. (D 3/8 carat total weight) This item is a SEMI-MOUNT and it comes with NO CENTER STONE 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: 3.54Accent Diamond-Shape: RoundAccent Diamond-Weight: 0.36