You'd have to do a google pic search to see if any of the tiles are worth much, some, like the ones in old hallstands and fire surrounds can be worth stupid money.
Some people buy the old hallstands just for them. We were very lucky to get one with all the tiles intact and then to be able to transport it over here without damage. They are brown and white and the pattern is a central circle with flowers in it like you were looking down on the bowl, set inside a square on top of another square, set at 45 degrees to it. Then what looks like mosaic around it. If anyone is bovvad I'll take a pic.
Looking more closely at them, they may be worth a bit, the whole ones that is!! Looking at the backs of them you may be able to identify them more closely. via marks.
I'll remove the wood they are stuck onto & take them home then have a go at removing them.