Honed stone field guide
Materials
How to buy stone by the slab rather than by the name on it, and why nearly everything we specify comes back honed.
Stone is the line on a specification that clients lose sleep over, usually for the wrong reason. The name on the invoice matters far less than the block it came out of, the direction of the cut, and what the finisher does to the face.
Buy the slab, not the name
Travertine is not a colour, it is a family. Two slabs sold under the same name can differ more from each other than travertine differs from limestone. So we buy in the yard, from the slab, with the whole face wetted down, because wet is roughly what sealed will look like. A supplier who will not let us throw water at a slab is a supplier we do not use.
Cut direction changes the same stone completely. Vein cut gives a long linear striation, cross cut gives a cloudier open figure. The stair at Villa Sereno runs vein cut travertine so the striation climbs with the flight and the skylight has something to travel along. The island at Casa Chiado, finished last month, is read as one plane from every side, so cross cut was the answer there and vein cut would have looked like a mistake.
Why honed, nearly always
Polished stone is a mirror with a stone behind it. It shows every drop of water, it takes a scratch as a dull line you cannot stop seeing, and under a downlight it throws glare back at eye level. Honed is the same stone stopped a few grits earlier. The face is flat and matte, and it absorbs a scratch the way skin does, which is to say the scratch stops being an event.
Honed can also be repaired. A honed floor is resurfaced in place with a hand machine and finished to match. A polished one has to be redone wall to wall or the repair reads as a patch. Villa Palma runs Santanyí limestone through every floor and into a bath cut from a single piece, and since handover the only thing anyone has done to any of it is a hot cloth.
The exceptions are worth holding to. Brushed finishes belong outdoors and on any step that gets wet, because honed limestone underfoot in rain is a hazard rather than a look. Split face and bush hammer are for elevations, not for rooms. A shower floor gets a smaller format and more joints, because grout lines are grip. And a turned piece behaves differently again. The pedestals at Serra Archive were turned at three heights and finished on the lathe, where the tool decides the surface and nobody hones anything. One test settles most arguments. Ask for a sample no smaller than 300 by 300, sealed on one half only, and leave it in the room it is meant for. Put a glass of red wine on it and forget about it. Whatever it looks like a week later is what has actually been specified.