Sculpture
Sculpture is the art of developing a medium such as clay, glass, copper, or other malleable material into a shape, form, or model from an idea, belief, or need.
History
Although one might think of sculpture as a practice limited to the world of art expression, the first sculptures might have been created as icons, or representations of the supreme being(s) that were worshipped.
Material
Although sculpture as an art was limited to natural materials in its infancy, advancements in materials science have allowed arists to create their work out of stones, metals, woods, and even every-day items such as trash, recycled material, industrial materials(glass, steel, diamonds). A lot of "modern sculpture" is even made from non-convential material: glue, paper, wire, plastic, fruit.