What is "scagliola"

Scagliola \Scagl*io"la\, n. [It. scagliuola, dim. of scaglia. See Scaglia.] An imitation of any veined and ornamental stone, as marble, formed by a substratum of finely ground gypsum mixed with glue, the surface of which, while soft, is variegated with splinters of marble, spar, granite, etc., and subsequently colored and polished.

n. Plasterwork imitating marble, granite, etc..

Scagliola (from the Italian scaglia, meaning "chips"), is a technique for producing stucco columns, sculptures, and other architectural elements that resemble inlays in marble and semi-precious stones. The Scagliola technique came into fashion in 17th-century Tuscany as an effective substitute for costly marble inlays, the pietra dura works created for the Medici family in Florence.

Scagliola is a composite substance made from selenite, glue and natural pigments, imitating marble and other hard stones. The material may be veined with colors and applied to a core, or desired pattern may be carved into a previously prepared scagliola matrix. The pattern's indentations are then filled with the colored, plaster-like scagliola composite, and then polished with flax oil for brightness, and wax for protection. The combination of materials and technique provides a complex texture, and richness of color not available in natural veined marbles.

A comparable material is terrazzo. "Marmorino" is a synonym, but scagliola and terrazzo should not be confused with plaster of Paris, which is one ingredient.