Please, tell me that you're not serious!
I can't think of many other stones as bad as those two for a kitchen countertop (outdoor or indoor it doesn't matter).
Consider soapstone instead, if you like the rustic look.
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
www.marblecleaning.org – The
Only Consumers' Portal to the Stone Industry Establishment!
Article ID: 1171
Created On: Sun, Feb 10, 2008 at 10:20 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=1171