Wikipedia
Coade stone or Lithodipyra (Ancient Greek (λίθος/δίς/πυρά), "stone fired twice") was stoneware that was often described as an artificial stone in the late 18th and early 19th centuries. It was used for moulding Neoclassical statues, architectural decorations and garden ornaments that were both of the highest quality and remain virtually weatherproof today. Produced by appointment to George III and the Prince Regent, it features on St George's Chapel, Windsor; The Royal Pavilion, Brighton; Carlton House, London; the Royal Naval College, Greenwich; and a large quantity was used in the refurbishment of Buckingham Palace in the 1820s.
Lithodipyra was first created around 1770 by Eleanor Coade who ran Coade's Artificial Stone Manufactory, Coade and Sealy, and Coade in Lambeth, London, from 1769 until her death in 1821, after which Lithodipyra continued to be manufactured by her last business partner William Croggon until 1833.
The recipe and techniques for producing Coade stone have been rediscovered by the team at Coade ltd., which now reproduce a range of Coade sculpture at their workshops in Wilton.
Usage examples of "coade stone".
Settling a hand on the ornamentation, he deduced that it was not real stone but Coade stone, an artificial material that was used for quoining and sculpture when using real stone was too expensive.