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Article

Trevor Proudfoot

Material most commonly used as a cheaper alternative to stone. Occasionally, its special properties make it a preferred but more expensive choice to stone. In its simplest form, artificial stone is an ashlar covering for buildings (e.g. 18th-century terraced houses by John Nash). It is found in its most sophisticated form as the component of numerous 19th-century terracotta or cement-based sculptures....

Article

Gordon Campbell

Copper-green stone. In ceramics, the term denotes a glaze used to create pottery with the copper-green colour of malachite. Powdered malachite was long used in wall painting, but is only rarely used in easel painting. Deposits of malachite were discovered in Siberia in 1635, and thereafter malachite vessels were produced in the Kremlin workshops. Objects made of malachite were fashionable in the first half of the 19th century, reaching their technical height from ...

Article

Tile  

Bernadette Nelson, M. Leticia Sánchez Hernández, Bruce Tattersall, Hans van Lemmen and Cleota Reed

Thin slab of fired clay used for covering roofs, floors, walls, stoves and chimney-pieces; they can be either square, rectangular, hexagonal, cruciform or star-shaped, so that they can be fitted together to form a mosaic or tile-panel. The most commonly used material for decorative tiles is glazed ...

Article

Gordon Campbell

Ornament consisting of random grooves that resemble worm tracks. In architecture the term is used of stonework; in metalwork and enamel it denotes a type of background ornament. When used on porcelain at Sèvres it was known as vermiculé.

See also under Masonry, §II.