Cathedral Split Shank Diamond Ring with a Square Halo 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 6-6.5mm cushion cut center stone.Metal Type: 18kt goldMetal Color: WhiteStone Type: Diamond - WhiteCenter Stone Shape: CushionStyle: Halo style Weight: 5.05Accent Diamond-Shape: Round Full CutAccent Diamond-Weight: 0.46