Quarry Tile (unglazed)
Paver/Quarry: Quarry Tile (unglazed)
Traditional quarry tile was unglazed and either red or gray; however, modern "decorator" tiles come in a variety of tints and finishes.
The most traditional size of quarry tile in the US is nominally 6 in × 6 in × ?1/2 in thick. Other common sizes include 4 in × 8 in and 8 in × 8 in.