Don't Underestimate the Grout
With Metro Marble, grout isn't just a practical necessity. It determines how much of the underlying metro geometry you see.
A closely matched grout allows the marble effect to become the dominant visual element. The individual tiles remain defined, but the wall reads as a relatively continuous material.
A contrasting grout emphasises the rectangular format and creates a stronger graphic grid.
This is particularly noticeable with the 10x20 bevelled tiles. The bevel already creates shadow around each tile, so a strong grout contrast can produce a very pronounced metro effect.
If you're using a heavily marked marble effect, I'd generally lean towards complementary grout unless you specifically want the geometry to be part of the statement.
If you're faced with the range and aren't sure where to begin:
Want clean and contemporary?
Start with flat 10x20 matt.
Want classic metro character?
Look at 10x20 bevelled gloss.
Want a more spacious, modern wall?
Consider 10x30.
Want light and reflection?
Choose gloss.
Want a softer, more architectural finish?
Choose matt.
Want something genuinely decorative?
Explore Gold Brick.
This is one of those collections where ordering a sample is particularly worthwhile. Marble effects can look significantly different depending on the scale of the tile, the amount of veining visible and the lighting in your room.