I assume you mean something tangible and not the gift of life, love, etc.
A couple of years after Dad passed away, Mom had is wedding band cut in half and made into a pair of half-hoop earrings. The one with their initials and wedding date engraved was always worn in her left ear because it was “closer to her heart.”
A couple of years ago, she confessed to us that she lost one of the earrings. After I became engaged, I asked her if I could have the remaining one to use to make a wedding band for my fiancé, and she said that she would think about it. The next time I went home, she said that she checked with my siblings, who gave their approval, and handed it to me. It was the one that was engraved.
Since they had such a loving marriage, it sort of feels like a symbolic good luck charm for our future happiness.