Mirror-polished Kota stone stacked after the polishing line

Surface work

Kota Stone Polishing

Polishing is where most of the added value — and most of the added cost — in a Kota floor sits. It is also where most of the confusion is, because the same word covers a factory process and a site process that produce quite different results at quite different prices.

The finishes

What each level of polish means

In order of how much machine time goes into the surface, and therefore of cost.

NaturalUntouched off the bed. Full texture, full grip, lowest rate.

Sawn / machine cutFlattened on the saw but matt. The usual starting point for a floor that will be ground and polished in place after laying.

Diamond cutCut on a diamond blade for a flatter, cleaner face than sawn. Tighter joints, less grinding needed afterwards.

HonedGround smooth but deliberately not reflective. The best general-purpose internal floor finish — easy to clean, no glare, keeps reasonable grip.

Table polishA single machine polish giving a light sheen. A middle option between honed and full mirror.

Mirror / high polishSeveral passes with progressively finer heads until the surface is reflective. Striking in lobbies and showrooms — and slippery when wet, so keep it away from bathrooms, ramps and external work.

Diamond polishPolished with diamond abrasives for a harder, deeper gloss that holds up better than a conventional mirror polish under traffic.

LapatroA soft-sheen dimpled finish taken on the diamond-cut face of the slab. Hides marks far better than a mirror polish and keeps more grip — increasingly the choice for domestic floors.

Leather / riverThe same soft sheen, but worked on the rough as-split face instead of a cut one, so the stone’s own texture stays under it. Which face is polished is the whole difference between leather or river and lapatro.

Rock facedSplit rather than polished, leaving a natural broken face. For cladding and feature walls.

Two different jobs

Factory polish against in-situ polish

They are not interchangeable, and knowing the difference will save you money on either route.

Factory polishingDone here on a polishing line before the stone ships. Consistent across the lot, no dust or slurry on your site, and the floor is usable as soon as it is laid. Needs calibrated stone and a good mason, because any lippage between pieces is permanent.

In-situ polishingThe stone is laid unpolished and the whole floor is ground flat and polished as one surface. Slower, wetter and messier, but it eliminates lippage entirely and gives that seamless traditional Indian floor. Needs skilled labour and a lot of water.

CalibrationGrinding a whole lot to one consistent thickness. Not a polish at all, but the thing that makes factory-polished stone practical to lay — and a real saving in mason time on any large floor.

Re-polishing laterA worn Kota floor can be ground back and re-polished in place, decades on, and come up like new. Very little flooring can be renewed this way, and it is a large part of why Kota is worth specifying.

Choosing

Which polish for which floor

Living rooms, bedrooms, offices: honed, lapatro or in-situ polished. Comfortable, low glare, low maintenance.
Lobbies, showrooms, reception areas: mirror or diamond polish, where the shine earns its keep and the floor stays dry.
Bathrooms, kitchens, utility areas: honed or leather. Never mirror.
Verandas, courtyards, paths, driveways: natural, sawn or rock faced. External polish does not survive UV and rain, and it is unsafe wet.
Temple and institutional floors: in-situ ground and polished, 25–32 mm, so it can be renewed again in twenty years.

Questions

Kota Stone Polishing

What is the difference between mirror polish and diamond polish Kota stone?

Both are reflective. A conventional mirror polish is built up with polishing heads; a diamond polish uses diamond abrasives and produces a harder, deeper gloss that holds up better under traffic. Diamond polish costs more and lasts longer.

Can Kota stone be polished after laying?

Yes — and traditionally that is exactly how it is done. The floor is laid in natural or sawn stone, then ground flat and polished as one continuous surface. It removes lippage completely and is often cheaper overall on large floors.

How do I restore a dull or scratched Kota floor?

Re-grind and re-polish it in place. Kota takes this very well and an old floor can be brought back to a better surface than it started with. Etch marks from acid also come out this way, which is why they are annoying rather than fatal.

Does polished Kota stone need calibration?

If it is factory polished and you want to lay it thin-bed or with tight joints, yes. Uncalibrated stone varies in thickness across the lot and the mason has to pack every piece to keep the surface flush, which costs more in labour than calibration costs in material.

Is polished Kota stone slippery?

A full mirror polish is, when wet. That is a specification decision, not a fault in the stone — use honed, leather or natural anywhere water reaches, and keep the mirror finish for dry internal areas.