Note: Do not rely on this information. It is very old.
Scagliola
Scagliola denotes in ornamental art an Italian process for imitating stone. The material is composed of plaster and glue, receives bits of stucco or stone, according to the imitation desired, and may be coloured by metallic oxides. Granite can be imitated by employing small crystals, Sometimes as many as twenty coats are put on before the surface is finally polished.