Looking for natural stone based on pictures

Hi everyone,
can you maybe help me with your geological expertise? I am specifically looking for such tiles made of natural stone:
Is this limestone or marble? I have already contacted the architects of the houses - maybe I will still get an answer.

We are currently also planning the combination of parquet/natural stone :)

That is "Natursteinoptik" - those are completely normal tiles...

If it is natural stone, I would guess travertine.

Would also guess Travertine or alternatively FSZ. Possibly even marble - but that is usually polished.

Google Atlas Concorde, natural stone look. I also think that they are "only" tiles. To look good and natural, it doesn't have to be natural stone.

The slightly gray could also be Muschelkalk. Kirchheimer Muschelkalk is very beautiful.