Basically, masonry is talking about any material that's put together in units and bound together with what is called mortar. Mortar is short, the "glue" because of these sorts of things. There are a numerous different materials you can use in bricks for mailbox, including granite, brick, marble, limestone, concrete, https://tysontlbs14714.wikienlightenment.com/7622961/brick_mailboxes_classic_curb_appeal_with_lasting_durability