What is the best place to sell a diamond?

Hello blind. I recently found what I considered to be a mispriced diamond for sale and purchased it for a good price. Anyone have a recommendation of a place to sell a diamond? Lab grown, 4.05 carat Vvs1, H, super ideal, emerald cut. I think that I found something someone would love to use to make a ring and propose with. Or just make a badass piece of jewelry. Any recommendations on where to sell it? I don't really want to do pawn shops, and ebay charges huge fees TC 150k Edit : I paid 2k for it