Nowadays, if the stone is distinguished by species, it can be divided into four categories, in addition to sedimentary rocks and metamorphic rocks, as well as igneous rocks and artificial rocks. Sedimentary rocks are mainly from glaciers or rivers, oceans and plants, and organic objects such as wind. Generally, after the debris of these organic objects is separated from the main body, due to long-term deposition, rock deposits of sedimentary rocks are formed, and after hundreds of years or even thousands of years of alternating hot and cold, high temperature and high pressure, etc. It is more sturdy, so we form the sedimentary rock we commonly call.
Metamorphic rock is a kind of stone that gradually changes from a stone to another stone under the urging of the natural environment after mixing with minerals under high temperature and high pressure, and this ore is called metamorphic rock. The marble and slate we use in our lives are all types of metamorphic rocks.
Igneous rocks are mainly formed by a volcanic material, such as magma. Since the liquid magma under the surface is cooled and solidified, the mineral gas and the liquid simultaneously infiltrate into the rock, forming new crystals during the infiltration process, and the colors are diverse, for example, granite. Because of its hard texture, this granite is easier to maintain than ordinary marble.
The artificial stone usually seen is made of some non-natural mixture, such as resin and cement, plus some binders, which can be mass produced in modern machinery, such as our daily life. The terrazzo, condensed stone, cultural stone and counterfeit stone seen in the series belong to the artificial stone series.
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