Discoloured Marble, New Install. Help Please !!

[Tile Shop]

So the other way round, if sealed like it should be first, then applying the epoxy, would that have a dodgy affect on the seal?

 

[Lithofin BOB]

I imagine this would not effect the impregnator ( solvent based)will be cured water and oil reppelance, it may re activate slightly with its chemical make up . But again should it be next to a natural stone? Will look into this.

 

[Italy]

for me , not being the same block of marble , is not it ?

 

[widler]

They do look a completly different pattern to the rest @antonio

 

[Lee T]

Looks like moisture still in the tile too me he could of used rapid set white with the other tiles and maybe a grey adhesive in these

 

[thompsonbrown]

If you already had them 4 tiles or from the same batch purchased that were used It could be a drying problem and might blend in overtime. If you fitted underfloor heating this might help once adhesive has had chance to cure. Im at a loss that your marble was not sealed prior to grouting and as mentioned fitted with epoxy grout. If all else fails you could seal the tiles with a slightly colour enhanced marble impregnation to help blend what you have. also what wetroom tray was have you used? just dont recognise it.