nero antico marble

What is the lighter marble called

The wall tiles look like Carrara marble but possibly taken from a couple of different batches - see how the background of some tiles is lighter than others. Normally they are a consistent colour so you don't get the patchwork effect but, I guess, you could make a feature of the differences by using two batches, as they appear to have done here. The antico is very dramatic and works beautifully as the feature wall. Love it.