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Unread 11-28-2009, 06:37 PM   #7
Florida Tile & Stone Man
Join Date: Apr 2004
Location: Naples Fl.
Posts: 22,690
Typically a Carrera would turn a gray if it had iron oxide, although i have seen a yellow tint,which may be magnesium...or just a haze from the grout. I have personally seen this with some grouts, so bad in fact i thought it was pollen.Why it is just one row stumps me also.
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