Wouldn't it be simpler to sell $20-30 dollar jewelry for 50$ with explicit promise that this jewelry is very easy to return in exchange for the 50$ gift card? You could add RFC chips to them so people couldn't return counterfeits. Epoxy resin is good at covering chips.
It would solve the problem of littering your house with cheap products, save the buyer the embarrassment of gifting something that looks like 2$ jewelry (it is noticeable when it is that cheap), and it makes easier for people to pretend that they actually want that necklace for the necklace and not for the gift card.
It would solve the problem of littering your house with cheap products, save the buyer the embarrassment of gifting something that looks like 2$ jewelry (it is noticeable when it is that cheap), and it makes easier for people to pretend that they actually want that necklace for the necklace and not for the gift card.