A Custom Star Map showing the night sky on the day you said "I do."
A The Adventure Challenge: Couples Edition book to document new memories.
Since it's an organic material, it's often linked to the first year; consider Mother of Pearl Earrings.
An Initial or Anniversary Date Charm for her bracelet. 25 First Wedding Anniversary Gift Ideas | Paper Gifts One Fab Day 10 of the best paper anniversary gifts | Martha Brook Martha Brook