Yes I have seen those as well Fred.
I think Mike may have nailed it as it does look like an Arizona sandstone.
It is some filthy stone Mike-
The Job is out of Town so I can see it only thru pics at this point.
Here is another pic-

On Sun, Apr 19, 2015 at 7:53 AM, Fred Hueston (via sccpartners list) <nobody@simplelists.com> wrote:
This email was sent from aol.com which does not allow forwarding of emails via email lists. Therefore the sender's email address (fhueston@aol.com) has been replaced with a dummy one.

Stu

From the pic it is hard to tell. I have seen Porcelain tiles that look just like slate...so it could be porcelain too

Frederick M. Hueston
www.stoneforensics.com
321 514 6845



-----Original Message-----
From: stuart rosen <mail@stoneshine.com>
To: sccpartners <sccpartners@stoneandtilepros.simplelists.com>
Sent: Sat, Apr 18, 2015 9:56 am
Subject: Stone ID

I was thinking this was a slate-Would anyone know this material?

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Regards,
Stu Rosen
201-446-1200
" EVERYTHING MATTERS"


 
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--
Regards,
Stu Rosen
201-446-1200
www.stoneshine.com
www.mbstonecare.com
www.mbstonepro.com
"EVERYTHING MATTERS"