Repair a crack in granite counter

[joeaustin]

After setting the granite counter slab ("Granito Moderno"), we saw a crack which must've happened while moving the piece.  It is at the sink cutout and runs from the bullnose edlge in to the cutout.  Nothing has chipped away (yet) but it feels like you could almost prick at it with your fingernail and it seems like it's buckled just a tiny bit at the crack.  In a couple spots along the crack, the granite appears a little lighter too.

I'm assuming I can fix it just like you do a seam (, but here's my question:

Should I open it up a little first?  Like, should I  lightly chisel the crack, making it a little large so that there's more of an opening to fill and repair?  The reason I wonder this is because on one side of the crack it feels just slight higher than the other side.  OR, should I just leave it like it is because I can buff it out and make it smooth with polishing pads??

[Mark D.]

If the crack is tight - that is there is no fissure, you should use a penetrating epoxy to fill it and strengthen it.
http://www.defusco.com/stoneweld-crack-filler-epoxy-24oz-p-1982.html

This stuff is like water & will penetrate through the crack so the crack will not get larger.

After that has cured and you are not worried about the structural integrity of your countertop you should fill the crack ( if necessary) with our crack repair kit.
http://www.defusco.com/granite-marble-chip-repair-kit-p-2476.html

In the future when you are moving a slab, try rodding it first for reinforcement. Just cut a slot in the bottom of the slab and glue in a piece of steel (metal fishtape or 1/4" x 1/8" metal stock.

Mark