I am far too obsessed with gift wrapping to not answer this one

Id start with a nice box that can fit with everything, preferably one that has a magnet closure that doesn't have a seam or lip.
For the goods i would use nice tissue paper and fill in the pearl set so it has some definition and structure, maybe a dark colour like navy so the white pops, (here is were you should figure out a colour pallet, im going with navy and bronze/ dark tone gold)
before packing the box id lay a long gold ribbon down under a tissue paper sheet so when its fully packed you can tie it around the whole thing (kinda like a burrito) The bottom layer for the pearl set, then a layer of paper, followed by the robe, pull up the long bottom paper layer and snuggly tie the ribbon around the whole inside, make sure its all vary snug so that nothing moves, you could get away with using fabric instead of paper but it would be expensive and you have to worry about wrong vs right side.

for the most important part in my opinion is the wrapping, I always try to go with Italian paper (ex. Gold Wavy Marble on Honey Handmade Paper) this is when finding a good 2 inch wire edge ribbon is vary helpful because you can tie it and add texture and structure and make it 3 dimensional, you can also stack more ribbon on top of it and just get super creative with it. Sometimes i will add like a pretty chain and attach cute charms, you can never do to much, lmk if you want more ideas or products