Marble is a metamorphic rock that results from the heating and pressing of limestone.
Marble is a calcite-based metamorphosed limestone known as dolostone (or dolomite). Calcite or dolomite crystals that have undergone recrystallization often grow to be bigger and interconnecting.
Although marble and quartzite frequently have a similar appearance to quartz, these materials are more softer. Marble is a metamorphic rock that results from the heating and pressing of limestone. As interlocking grains expand, the calcite in the limestone changes, and fossils and layers in the original limestone vanish.
A white marble is created from pure limestone. Layers of clay or sand may be present in limestones, creating the attractive flow banding and colours seen in decorative marble. Although they are both composed of calcite, marble has a slight hardness advantage over limestone since it is metamorphic rather than sedimentary.
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