Tumbled stone is made of blue/grey limestone, which is a kind of
classical, artistic and non-radioactive stone. It is widely used in
indoor and outdoor paving, wall building, carving etc.
This is the machine tumbled tile. Flat even surface with fine
circular scoring that may be difficult to identify in some
finishes. It is only the particular sizes of tile/slab can be by
machine tumbled. It looks like the antiques experience many years.
So it is much more elegant. The flooring and wall stone like it
will more magnetic.
If anything I can do for you about blue limestone, please do not hesitate to let me know! Thanks for your E-mail or phone!