When deciding on an urn, cheaper is not always cheaper. Fragile (glass, crystal, pottery) or wooden urns often require an urn vault. Check with the cemetery before purchasing to see if a vault is required. If you plan on storing the urn, a stone or composite urn, such as ours can be placed outside in a garden. Natural stone and cultured stone urns, do not require a vault. Sometimes a little more money upfront can save you later.