My slate was installed a couple of weeks ago but not grouted. Then a bunch of Subs walked over it finishing things. The tile layer did not finish the floor because we were waiting on another order of tiles because we were two tiles short. It was grouted last week. That's when I noticed this chip out of the corner. I know slate can do this but should they replace it or do I just live with this? I wouldn't worry about it necessarily except it's right as you come in the garage door in heavy traffic pattern please tell me what you guys would do.