Marble

Marble is a widespread metamorphic rock. Depending on whether the marble originates from limestone or dolostone, marbles consist of either calcite or dolomite. Marble may contain quartz, nailstone, garnets, pyroxenes, diopside, serpentine, etc as an additive.
It is softer and more porous than granite or pressed quartz. Suitable for bathrooms and fireplaces, window sills.