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- a kiln fired artificial stone, very durable, the formula, invented by George Coade,
included clay, sand and fluxes and grog, which is ground down previously fired stoneware.
Difficult to distinguish from natural stone, it was widely used by the leading architects of the day
during late 18th early 19th centuries, including Adam, Nash and Soane. The detail on Buckingham
Palace is in coade stone.