Four types of stone

Now, if the stone used to distinguish between species, it can be divided into four categories, in addition to the sedimentary and metamorphic, igneous and artificial stone as well. The sedimentary rocks mainly from glaciers or rivers, oceans and plants, as well as wind and other organic objects. Generally these organic objects after debris from the body after, due to the long deposition, so he formed a sedimentary rock deposits, plus several hundreds or even thousands of years of alternating hot and cold, high temperature and pressure of the natural environment experience, change a more robust, so we called to form a sedimentary rock.
Metamorphic rocks is a high temperature and pressure after mixing and minerals in the natural environment to promote next by a stone gradually into another stone, and this ore were what we call rocks, like life we ​​use marble, slate and other rocks belong to a type of product.
Igneous rock which is mainly composed of a volcanic material and form, for example magma. Because after Liquid cooling magma under the surface and solidified, so that this liquid gas and minerals simultaneously penetrate the rock, in the process of infiltration among the new crystal form, and color variety, such as: granite. And this because of its hard texture of granite, marble is much easier than curing.
And usually we see artificial stone is to be made by some non-natural mixture, for example, resin and cement, plus some of the adhesive, and such artificial stone can be mass-produced with modern machinery, such as our daily life as seen terrazzo, agglomerate stone, cultured stone and imitation stone belong to the man-made stone.