Although urn vaults are not mandatory, some families choose to use one when interring an urn at a cemetery. Urn vaults are available in materials such as marble or fiberglass, and come in different sizes to fit any urn. They give space to place mementos and keepsakes such as: flowers, photos, letters, trinkets, etc. It also provides a layer of protection to the urn itself. If a family chooses not to have a vault, the urn can be interred naturally into the earth.