Square Vintage Halo Diamond Ring with Milgrain and Etching Detail in 18kt White Gold. (D. 1/3 carat total weight) This item is a SEMI-MOUNT and it comes with NO CENTER STONE as shown but it will accommodate a 5.8mm round center stone.Metal Type: 18kt goldMetal Color: WhiteStone Type: Diamond - WhiteCenter Stone Shape: RoundStyle: Vintage Weight: 5Accent Diamond-Shape: RoundAccent Diamond-Weight: 42738