What if I don't want my partner to buy me jewelry as a gift?
Why don't you want jewerly?
I don't want him to buy me expensive gifts.
I understand your concern that he shouldn't spend so much money on gifts. If he's happy with buying jewelry, you should feel happy too.
Maybe I don't like expensive gifts and I do like normal inexpensive gifts. I like inexpensive gifts much more.
If you really feel that way then you should just tell your partner. That way they know what to buy you going forward.