This is ceramic tile that is a mud job...the tiles are concreted down.
By Maggie (Guest Post)
04/14/2007
I would suggest using a table knife to lift the tile ever so slightly to allow room for a small artist's paint brush to apply just enough tile glue and setting something heavy on top of the tile over night to give the glue a chance to grab. You may want to mask off the surrounding area to protect the floor from any over abundance of glue that may seep out.