An ornamental stone is a stone used as a decoration. They differ from gemstones in that they are not only used for jewelry. However, an ornamental stone may also be a gemstone. Alabaster is an example of an ornamental stone. It is used for the rails of staircases and halls in fancy buildings. Marble is an ornamental stone used for sculpture and as a building material. Our earth is composed of three main types of rock, each having been formed in its own special way. ... A gemstone is a mineral, rock (as in lapis lazuli) or petrified material that when cut or faceted and polished is collectible or can be used in jewellery. ... Jewelry (the American spelling; spelled jewellery in Commonwealth English) consists of ornamental devices worn by persons, typically made with gems and precious metals. ... Alabaster (sometimes called satin spar) is a name applied to varieties of two distinct minerals: gypsum (a hydrous sulfate of calcium) and the calcite (a carbonate of calcium). ... Stairs, staircase, stairway, flight of stairs are all names for a construction designed to bridge a large vertical distance by dividing it into smaller vertical distances, called steps. ... Marble This page is about the metamorphic rock. ... Sculpture is a three-dimensional form created as an artistic expression. ...