A single block of marble or travertine hollowed out and finished by hand, with no seam, no joint and no liner.

Around 2,000 lb (900 kg) empty, and roughly 2,700 lb once filled with water and occupied.

On a suspended timber floor, usually yes. A structural check before delivery is not optional at these weights, and the route into the room has to be planned rather than assumed.

Solid stone tubs run from about $10,000 to $15,000 depending on the stone and the length.