What causes the veining in marble?

Veining in marble is caused by the presence of different minerals within the rock. Marble is a type of metamorphic rock that is formed when sedimentary rocks such as limestone or dolomite are subjected to high pressures and temperatures over time. The process of metamorphism can cause the minerals within the rock to recrystallize and form a new rock called marble.

During the metamorphism process, different minerals within the sedimentary rock may recrystallize at different rates or in different ways, resulting in the formation of bands or veins of different colors and textures within the marble. These bands or veins are caused by the presence of different minerals, such as quartz, feldspar, or mica, which can give marble its distinctive appearance.

Marble can also contain impurities or foreign materials that were present in the original sedimentary rock. These impurities or foreign materials can also contribute to the veining patterns that are seen in marble.

In summary, the veining in marble is caused by the presence of different minerals within the rock and by impurities or foreign materials that were present in the original sedimentary rock. The process of metamorphism causes these minerals and materials to recrystallize and form the distinctive bands or veins that are characteristic of marble