Marble Calacatta Oro Honed 18x18x3/8
What is Marble?
Marble is a non-foliated 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.[1] Marble is commonly used for sculpture and as a building material.
More information about marble https://en.wikipedia.org/wiki/Marble