Artificial stone Wikipedia
One of the earliest was Coade stone (originally called Lithodipyra), a ceramic created by Eleanor Coade (), and produced from 1769 to 1833. Later, in 1844, Frederick Ransome created a Patent Siliceous Stone, which comprised sand and powdered flint in an alkaline solution. By heating it in an enclosed high temperature steam boiler the siliceous particles were bound together and could ...
