Colonial brick.
In today’s newspaper I had a brief piece about a product offering from a specialty fireplace company. Earthcore Industries is now selling historic bricks that they dug out of New England harbors. The bricks were originally used as ballast on voyages from England during colonial times. They were dumped into the harbors and replaced with goods like tobacco for the return trip.
The bricks have a distressed, handmade look to them. Earthcore mainly uses them as firebrick, which is the lining of the inside of a fireplace. I would insert a link to the story online, but it doesn’t appear to be up there, which I fear will become the norm now that the organization has laid off so many people. Anyways, here is some useful info from the Earthcore literature about different ways firebrick is laid:
Some common firebrick patterns are: (1) herringbone (2) stack bond (3) basket weave (4) running bond.