sam, i dont think u can return the jewellery back to her.... anyhow, is a token from her.. so just accept.
sometime when people buy gifts, they do not allow u to choose.. we just have to accept it..
yesterday, my uncle & auntie bought me a very expensive wedding gift - handbag. they also did not let me choose. they said if i dont like it, my auntie will take it.. luckily, i like the handbag.. anyhow, even if i dont like, i wont say so also la.. is not nice..
same thing, my bro & SIL also bought me a wedding gift.. i only saw it when they passed it to me last mth.. even the jewellery from my MIL.. i wont get to see it until GDL.. but then, since they are picked by my SIL who collects jewellery, i can be assured it will be nice..