1 carat F VVS1...starting at $33,000. I assume it is a super ideal? Even then it seems like it should cost $15k or so even if you sourced the diamond from a super ideal vendor. I guess the Harry Winston brand adds another $15k to the price tag?
https://www.harrywinston.com/en/one-cushion-cut-diamond-micropavé-engagement-ring.html
https://www.harrywinston.com/en/one-cushion-cut-diamond-micropavé-engagement-ring.html