You don't win the award for worst gift-giver, Heeven. She wins the award for worst recipient. Yeah, get the cross back.
The worst gift I ever received was also a wedding present. We have these friends who really, honestly, have no taste. Nice folks, just...no taste. They got us a glass candleholder...it was smoked glass and curvy-blob-shaped like something from the inside of a lava lamp. Very '70s. To make matters worse, they had engraved our names and the date of our wedding on it. In Old English.
They probably spent a fortune on it. It was a novelty item made by a very famous company (Wedgwood? Something of that caliber.)
We couldn't get $2 for it at our first garage sale.