Possibly copper deposits leaching up from the stone below?<br><br>Barry Raduta<br>Diamond Stone &amp; Tile Care<br><br><div class="gmail_quote">On Thu, Jan 6, 2011 at 6:38 PM, Fred Hueston <span dir="ltr">&lt;<a target="_top" href="mailto:fhueston@gmail.com">fhueston@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">ok partners...heres a tough one..what do you think is causing this discoloration.  It didnt turn this blueish green until after it was installed<div>
<br></div><div><br></div><div><br clear="all"><br>-- <br>Frederick M. Hueston PhD<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Thank You,<br>Barry V Raduta<br>Diamond Stone &amp; Tile Care<br>215-816-7689<br>