Marble belongs to metamorphic rock. Metamorphic rock is another kind of stone that is naturally transformed from one kind of stone under the mixed action of high temperature and pressure and minerals. The qualitative change may be recrystallization, texture change, or color change.
Natural marble is a metamorphic rock formed by the original rocks in the earth's crust through high temperature and high pressure in the earth's crust. It is a medium-hard stone, mainly composed of calcite, limestone, serpentine and dolomite. Usually, there are obvious patterns and many mineral particles.
Granite belongs to igneous rock, which is mainly formed by volcanic materials, such as magma. The liquid magma beneath the surface cooled and solidified. Mineral gases and liquids penetrate into the rocks to form new crystals and various colors.
Generally dark colors. Natural granite is an igneous rock, also called acid crystalline plutonic rock. It is the most widely distributed type of rock in igneous rock. It belongs to hard stone. The rock is hard and compact. According to the size of its crystal particles, it can be divided into "pegmatite" and "coarse crystal". And "fine crystal" three kinds.