Been finding these alot. I have no idea what they are b

[smf399]

I've been finding these a lot in old dumps but I have no idea what they are.

 

[taz42o]

They are tiles.
http://www.tileheritage.org/THF-TileoftheMonth-Apr-04.html

One Antique A E T Co Ltd Foyer Tile American Encaustic Tile Company Ltd Red | eBay