price difference of #2621 replacement ring

A)$789 for this ring with 2ct(6.5*13mm)  marquise GHI color moissanite center, moissanite accents in 14k yellow gold outside shank and 14k white gold inner shank

B) Size 7

C) The original ring has been recieved USPS#9400 1112 0246 0825 1790 28

D) price differece of this replacement ring is $44.56