Jenna Blue” Halo 3.17 Carat Sapphire and Diamond Ring Certify by World Most Famous GIA (Gemological Institute Of America) The center "Jenna Blue” Blue Sapphire weight 2.60 carat Natural Blue "Rare" Sapphire. The diamond ring weight 0.57 carat and it is 18 karat White Gold. Last picture has the GIA certificate. On purchase please let me know your size, I do same day resize service. Currently ring is size 7. Thank you.