Cathedral Diamond Ring with Square Halo in 18kt White Gold (D 5/8 carat total weight) This item is a SEMI-MOUNT and it comes with NO CENTER STONE as shown but it will accommodate a 5mm round center stone.Metal Type: 18kt goldMetal Color: WhiteStone Type: Diamond - WhiteCenter Stone Shape: CushionStyle: Halo style Weight: 3.67Accent Diamond-Shape: RoundAccent Diamond-Weight: 0.59