I have a friend who's an anthropologist and archeologist. More importantly, he's a flint knapper. He has 6(I think) kids and each one had his/her own flint knife made which was used to cut the umbilical cord. They are also real works of art.
I like Nala's idea, but I haven't received a wedding invitation yet.
Nice work all the way around; walnut, blade and sheath.