Any hard, coarse sedimentary rock that can be readily broken into thick slabs for use as paving, whetstones, etc.; = ragstone, n. 1. Formerly…

stone used for moulded work.

A lightish-yellow building-stone found near Caen in Normandy; it is at first very soft, but hardens on exposure. Also attributive.

A soft white building stone.

a light-coloured limestone quarried in the Isle of Portland and highly valued for use in building.

A building or paving stone of a bluish-grey colour; (U.S.) a bluish argillaceous sandstone. Frequently attributive.

As a mass noun: stone occurring naturally on the ground or in the soil, esp. as used for building.

An upper stratum of Portland stone characterized by a pale colour and homogeneous texture; stone from this stratum, valued for building. Frequently…

Chiefly Geology. Any of various kinds of rock or mineral deposit, generally shales or sandstones, either associated with springs or seeps of water or…

The name given in Sri Lanka to a reddish gneissoid building-stone, soft when quarried but hardening by exposure to the air; laterite.

(a) Geology a chimney-shaped body of rock; (b) in Florida, a porous phosphate rock used in building.

A Somerset stone, representative of the lower part of the Upper Lias, quarried in the Ham Hill quarry and used widely for building purposes in the…