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:
“He looked as if he wished to rive new war material out of the wombs of the mothers.”
—Anonymous. Quoted in Ellen Key, War, Peace and the Future, ch. 9 (1916)
“Someone had literally run to earth
In an old cellar hole in a byroad
The origin of all the family there.
Thence they were sprung, so numerous a tribe
That now not all the houses left in town
Made shift to shelter them without the help
Of here and there a tent in grove and orchard.”
—Robert Frost (1874–1963)
“As a thinker and planner, the ant is the equal of any savage race of men; as a self-educated specialist in several arts, she is the superior of any savage race of men; and in one or two high mental qualities she is above the reach of any man, savage or civilized.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)