Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble is typically not foliated, although there are exceptions. In geology, the term marble refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone.A marble is a small spherical object often made from glass, clay, steel, plastic, or agate. These balls vary in size. Most commonly, they are about 13 mm in diameter, but they may range from less than 1 mm to over 8 cm, while some art glass marbles for display purposes are over 30 cm wide. Marbles can be used for a variety of games called marbles. They are often collected, both for nostalgia and for their …
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