hi folks,<br><br>this is my first posting/ question so be gentle with me.  i have a manufacturer of travertine sinks who sold a sink to someone in the Philly area and the sink has a hole in it ( .25 - .5 inch big ).  she is trying to avoid having the sink deinstalled and reinstalling a new one and wants me or someone to fix it.i need to know if anyone knows about a travertine hole filling material that will work on this sink (must hold water).  i am open to any/ all suggestions.  thanks.......barry<br>