What to write so the stone you order is the stone you get.
3 answers are written under this subject. 3 answered so far.
The architect decides the look, the interior designer or the project engineer writes the specification, and the contractor buys it. In most projects the specification names a stone and a finish, and the block is chosen by whoever supplies it.
Name the bed and the block, the form, the thickness, the finish and the panel sizes — and require photographs of the actual slabs before cutting. A specification that names only a colour is a request for whatever is available.
That it is a marble at Mohs 3 that etches, that the figure is directional, and that the block number is the only identifier that survives being quoted. Those three things decide the finish, the layout and the paperwork, and each of them is settled at a different stage.
Ordered by how many questions each one holds.