Why provenance matters on this name
Carrara has been quarried continuously for more than two thousand years, and the name carried enough weight that it became a description of a look: a white to gray-white ground with fine gray veining spread evenly across it.
Once a name describes a look, stone that resembles it gets sold under it. So a tile called Carrara may be Italian, or it may be a visually similar marble from Turkey, Greece or Asia. Neither is a defect and the resemblance is often close, but they are not the same stone and this page is the one where that question is already answered.
What Italian Carrara looks like
A cool white to light gray ground, and veining that is fine, gray and spread evenly across the face. The veins run in threads where a Calacatta runs in bands, and that evenness is what makes one Carrara tile look like the next.
That evenness is the property that matters practically. It means a small format still reads as Carrara, where a heavily veined marble in a small tile can arrive with no pattern on it at all. The marble tile page sets out how the white marbles differ from each other.
Honed and polished, nothing else
This range is split between honed and polished with no third option, which is unusual and tells you what the stone is for. A polished Carrara deepens the gray of the veining and brightens the ground; a honed one lowers the contrast and gives an even, quiet surface.
Neither is a treatment applied to the stone in the way a glaze is applied to a tile. Both are the marble's own surface worked to a different degree, which is the reason the two read as one stone in two moods and not as two products.
The formats and the 3/8 inch standard
12x12, 18x18, 12x24 and 24x24, all of them 3/8 inch thick. That thickness is the standard for marble field tile and it is the figure that matters where this tile meets another one.
The size range is deliberately ordinary. Carrara is a stone people put on a bathroom floor, a shower wall and a kitchen backsplash, and those are surfaces that want a familiar format more than a statement one.
The chemistry, in one line
Carrara is a calcite marble, so a household acid takes a trace off the surface and leaves a dull mark. That is true of every calcite marble and it is not a fault of this one.
It is also why the honed half of this range exists: a dull mark on a honed surface is a change in a surface that was already matte. The marble tile page carries the full account, including which white marbles react more slowly.
Where Italian Carrara goes
A bathroom floor, a shower wall, a backsplash, a fireplace surround, and a hallway where somebody wants stone rather than a print of one. It has been used for all of those for centuries, which is most of the argument for it.
For the same look in a fired body, marble look tile is the printed alternative. For white marble across every quarry and format, white marble tile is the wider range.