Square Halo Diamond Engagement Ring in 18kt White and Yellow Gold. (D.1/4 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 cushion center stone.Metal Type: 18kt goldMetal Color: Two-toneStone Type: Diamond - WhiteCenter Stone Shape: CushionStyle: Halo style Weight: 3.84Accent Diamond-Shape: RoundAccent Diamond-Weight: 0.27