GIA Certified Center Diamond:Carat Weight: 20.03 CaratsColor : Fancy Brownish Greenish YellowClarity: SI1Style: Cushion Cut Ring:Settings: 4 Double Claw Prong, HaloMetal: Platinum & 18 Karat Yellow GoldStyle: Round Brilliant CutCarat Weight: 1.28 CaratsSize: Can be adjusted to any size. Total Carat Weight: 21.31 Carats