Dear Sir, I have bought marble tiles that is being laid in my lounge I have found many chips at the ends, some cracks on top, uneven almost cutting on some of the surfaces. The shades differ massively. The people I bought the marble from tell me its only because it's a natural product, and it has to be coated with something, repolished and rebuffed. I am concerned that they are trying to pull the wool over my eye. I would be grateful for your help. Thank you.