A brand name for a cast stone made from fired clay. Coade Stone was developed by Eleanor and George Coade in England and manufactured from 1769 to 1843. The formula, which was lost following closure of the factory, has only been deduced from recent analysis and experimentation. Analysis indicates the raw materials were ball clay from Dorset or Devon with the addition of 5-10% flint, 5-10% quartz sand, at least 10% grog and about 10% soda-lime-silica glass. The material was fired at temperatures between 11008C and 11508C over a four-day period, producing a hard, partially vitrified and durable material. Minimal shrinkage and distortion in the kiln, owing to the presence of the pre-fired grog, contributed to the material’s commercial success. These terracotta cast stones were used for interior and exterior ornamental elements. Coade Stone is acid resistant and weathers well. It was used for statues, tombs, balustrades, vases, pillars and decorative architectural elements. Synonyms: terracotta; imitation stone; architectural terra cotta; artificial stone. Freestone et al (1984); Trench (2000); Museum of Fine Arts, Boston (2000). [J. Cassar, R. de Angelis]