Sapphire and Diamond Ring in 18kt White Gold with 4-Prong Peg Head. (S.90 total gem weight) This item is a SEMI-MOUNT and it comes with NO CENTER STONE as shown but it will accommodate a 6.5mm round center stone. Peg HeadMetal Type: 18kt goldMetal Color: WhiteStone Type: SapphireCenter Stone Shape: RoundStyle: Classic Weight: 4.5Accent Diamond-Shape: Accent Diamond-Weight: