Material Origin and Qualities
Marble is a metamorphic rock derived from limestone, composed mostly of calcite (a crystalline form of calcium carbonate, CaCO3). The original source of the parent limestone is the seabed deposition calcium carbonate in the form of microscopic animal skeletons or similar materials. Marble is formed when the limestone is transformed by heat and pressure after being overlain by other materials. The finest marbles for sculpture have no or few stains (some natural stain can be seen in the sculpture shown at left, which the sculptor has skillfully incorporated into the sculpture).
Read more about this topic: Marble Sculpture
Famous quotes containing the words material, origin and/or qualities:
“Our life on earth is, and ought to be, material and carnal. But we have not yet learned to manage our materialism and carnality properly; they are still entangled with the desire for ownership.”
—E.M. (Edward Morgan)
“High treason, when it is resistance to tyranny here below, has its origin in, and is first committed by, the power that makes and forever re-creates man.”
—Henry David Thoreau (1817–1862)
“As there is a degree of depravity in mankind which requires a certain circumspection and distrust, so there are qualities in human nature which justify a certain portion of esteem and confidence.”
—James Madison (1751–1836)