Dear Michael:
Answering to your second question first, Angola Black is certainly not granite: it is a rock of the gabbro group, probably diorite. With a density rated between 0.1% and 0.2% it can't be technically sealed, which means that it will never stain.
That said, coming now to what you perceive as excessive pitting, I can't honestly side with you or your fabricator: only a physical inspection of your slab could enable me to make an assessment and draw a conclusion. I'm sure you can appreciate that.
All in all, however, typically that particular stone is not very “pitty”. Different grading, of course, may lead to slabs with excessive pitting.
But who knows anything (and/or care) about grading of stone?…
L
Does the world need marblecleaning.org or what?
Now remember, it's never too early to think about the proper maintenance of your stone. The issue of what you'll be doing day in and day out to your stone is – as it should be intuitive – vastly more important than its sealing
(if and when possible and/or advisable) and it's all too often neglected. As you can tell by reading many of this site's postings, you're not likely to get good information about routine care from your dealer or installer. Don't become another statistic!
By logging into the Helpful Hints section of our website at:
http://www.mbstone.com/HH_promo/helpful_hints.htm
,
you will be able to get the short version of our
maintenance guidelines at no charge. The full version of it
– a 7-page document considered by many as an industry benchmark – is available in pay-
per-download format in our
Educational Literature section at:
http://www.mbstone.com/literature/literature.htm
.
And remember, every single penny of the cost of the literature will be used to support this site and its cause: your cause.
While you are in the “Helpful Hints” section, do spend some time reading all of the interesting FREE articles you'll find in there!
Finally, keep in mind that we need your support to help us helping you!
Will you please read and e-sign our Statement of Purpose at: http://www.marblecleaning.org/purpose.htm?
By spreading the word about this valuable site among your friend & family and the stone trades' people you've been dealing with, you will be rendering everybody a valuable service!
Thank you
Ciao and good luck,
Maurizio Bertoli
www.marblecleaning.org – The
only Consumers' Portal to the Stone Industry Establishment!
Article ID: 1365
Created On: Wed, Apr 9, 2008 at 10:18 PM
Last Updated On: Wed, Apr 9, 2008 at 12:00 AM
Authored by: Maurizio Bertoli [mail@mbstone.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=1365