Dear Mario:
Among the stones you listed, travertine is the best. If you buy it saw-cut and unfilled, you will not have any slipperiness issue.
And make sure that they won't talk you into sealing it!
May I ask you now to please read and e-sign our Statement of Purpose at:
http://www.marblecleaning.org/purpose.htm?
Ciao and good luck,
Mauri
Article ID: 1168
Created On: Sun, Feb 10, 2008 at 10:03 AM
Last Updated On: Sun, Feb 10, 2008 at 12:00 AM
Authored by: Maurizio Bertoli [mail@mbstone.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=1168