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Marble Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Geologists use the term "marble" to refer to metamorphosed limestone; however stonemasons use the term more broadly to encompass unmetamorphosed limestone. Marble is commonly used for sculpture and as a building material. (source: Wikipedia) Photo by Michael Marcotte public domain photo above courtesy of U.S. Geological Survey Return to List Back to Michael's Hobbies page Back to Michael Marcotte's HomePage