What a lot actually is
Marble is extracted as blocks several tons each, and a block is sawn into slabs or tiles in sequence. Pieces from one block share their color and their veining because they were within a few inches of each other inside the mountain.
A lot is the output of one block or of a small group taken together. Two lots of the same named marble are the same stone and not the same material: the ground can shift a shade, the veining can change weight, and the difference shows most on a large uninterrupted floor.
Why the quantity is settled before anything else
On a large marble floor the order of decisions is different from a porcelain job. The stone comes first and the layout second, because the quantity available from one lot is fixed at the moment the blocks were cut.
That includes the allowance for cuts and the reserve for later. Cuts happen at every wall, doorway and fixed object, and a piece needed in three years has to come from material set aside now, since the lot will not exist then.
12x24 carries this range
12x24 leads the size list, then 12x12, 24x24 and 18x18, with a 16x24 and a 2 3/4x5 1/2 brick, and the pattern sets described below.
Thickness runs 3/8 and 1/2 inch here, split almost evenly, and that is a figure to fix early on a large job. Two rooms in the same stone at different thicknesses meet at a step, and thresholds multiply quickly once a floor covers more than one room.
Versailles and the pattern sets
Some of this range is supplied as a pattern set rather than as a single size: several different formats packed together in fixed proportions to be laid as a repeating module.
The Versailles pattern is the best known of them, a French arrangement of four or five sizes that repeats across a floor without an obvious grid. On a very large area that is its real advantage, since a single repeated square starts to look like a grid at scale and a pattern set never does.
White carries the colors
White leads this range, then beige and gray, with blacks and a multicolor behind them, in polished and honed faces with a few textured pieces.
White is where large stone jobs concentrate, and that is physical, not decorative. A pale marble reflects light across a big floor rather than absorbing it, so a large area stays open, and the veining in a white stone is what stops that area reading as blank.
Polished or honed over a large area
The split here is close to even, and the decision matters more as the floor grows.
A polished marble across a large span is a large reflector: it returns every window and fitting and it shows the trace of anything crossing it. A honed floor scatters the light instead, so it reads as an even stone surface at any size, and a mark in the finish has no reflection to interrupt.
Where a large marble order goes
A whole ground floor, a hall running into reception rooms, a large bathroom suite, a stair with its landings, a commercial entrance. These are the jobs where a single stone has to hold together across rooms that are seen one after another.
Marble tile is the material across every color and format, white marble tile the color this range concentrates in, and marble slabs the large pieces.
