Granite seam in middle of double sink clearly visible

I have a blue pearl bull nosed Granite (http://tanbrown.org) slab Counter (http://GialloFiorito.com) , it is ~3years old. The seams are now clearly visible, wider than a dime, more like a quarter. My faucet sits right on top of it. Looks like the epoxy or whatever adhesive is gone. What can I do to fill the gaps? Is it DIY or call a pro? I did a search in this forum but could not find an answer.