How is Marble Made?

The name limestone is from limus (Latin) for mud. The name marble is derived from the Latin marmor and from Greek, which means a shining stone. Marble has been used for sculpture since about 6,000 years ago and for the construction of buildings since about 2,500 years ago.

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Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. It is composed primarily of the mineral calcite (CaCO3) and usually contains other minerals, such as clay minerals, micas, quartz, pyrite, iron oxides, and graphite.The calcite in the limestone recrystallizes into marble that is a mass of interlocking calcite crystals. A related rock, dolomitic marble (dolomite), is produced when dolostone is subjected to heat and pressure.

Marble is usually white, but mineral impurities add colour in variegated patterns. For example, hematite adds red, limonite - yellow, serpentine - green and diopside - blue.

Calcite is an extremely common rock forming minerals on Earth’s crust. It is widely used in different industry. In construction, beside marble and limestone, Calcite is used as mixture for Cement and Concrete. In agriculture, it is used as acid neutralizer for soils and water for farming. In dairy industry, Calcite is used as a dietary supplement in animal feed to enhance their calcium intake for milk and egg. In medicine, Calcite is also used as antacid for stomach acid. Also more commonly, chalk for blackboard is made of Calcite!

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