Thanks Adam
Yeah this is granite that looks like limestone-It is rusting or oxidizing on a building in Israel. They just want us to have it tested

On Sat, Jun 2, 2012 at 9:58 PM, Adam <> wrote:
Few weeks ago I was working on absolute black granite sign. 16'x6'x1 outside next to the busy road. It looked very rusty but it wasn't rust. I think it was deposits from nearby oak trees, cleaners didn't work so I ended up using pinch of 5x on white pad. It cleaned all in no time. Just a thought

Adam Bartos
BiO Tile & Grout Restoration
773-575-5515 (c)
847-438-0212 (o)

On Jun 1, 2012, at 9:40 AM, "John Freitag" <> wrote:



I would recommend contacting Fred Hueston he has several labs he is works with . if the granite is rusting many granites have natural iron deposits in them and over time will oxide. Other time I have seen polished granite take on a rusty look for a contractor that has honed the granite and then tried to crystallize the granite before it totally dried.



John E Freitag


The Stone & Tile School

Office 407-567-7652

Cell 407-615-0134






From: [] On Behalf Of stuart rosen
Sent: Friday, June 01, 2012 7:39 AM
To: Restoration and Maintenance
Subject: [sccpartners] Testing Stone


I have a customer that wants to have his granite tested. It is on the outside of a building and rusting.

Does anyone know a lab that will test the stone and identify its components.

The stone is a granite that is quarried in Israel.


Stu Rosen



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Stu Rosen