XR0718 enhancer :$719 for this enhancer with lab grown diamond stones in 14K white gold. Size 6.75
XR0718 semi mount: $547 for this XR0718 ring semi mount without 1.08ct round center stone, but with lab grown diamond accents in 14K white gold. Size 6.25
We check you paid total $1280 in #21790+21886+22031+22120. For this new replacement ring set is $2014($648+$547+$719)+$100(certificate fee). So you need to pay the price difference $734.