Slate Flooring - Can it be repaired?

We have a slate floor in our kitchen.  When the movers came, they dropped a metal pole and chipped and scratched four of the 12 x 12 squares.

 

Does anyone know if they can be repaired?  Or, if the four squares are removed and replaced with new ones, how bad will it look?  I would imagine four new squares pieces will really stand out against the rest of the floor that is 3+ years old.

 

Anyone have any advice, tips or suggestions?

 

Thank you