At present, there are many kinds of stone materials used in the industry, and there are also many classification methods of stone materials. It is classified not only by rock and mineral materials, but also by rock type and genesis, as well as by the technology and commerce of stone materials, chemical properties of rock and mineral materials, hardness of stone materials, basic shape, use and characteristics of stone materials. Of course, the classification of stone is not single level, but can be multi-level.
According to rock types, there are mainly three types: igneous rock, sedimentary rock and metamorphic rock.
The technical and commercial classification of stone materials mainly includes five categories: marble (marble), granite (hemp stone), slate, sandstone and gravel. The classification of stone materials is mainly determined according to the hardness, processing performance, application characteristics and product circulation characteristics of stone materials. The concept described here is just a stone commodity classification name. Compared with the concept of academic professional name, this classification method is not rigorous.
In the garden, according to the use, there are mainly decorative stone, cultural stone, building accessories stone, tomb stone, carving stone, craft stone, etc. It is mainly divided according to its use industry, scope, purpose, etc.
In use, basalt, diabase, diorite, granite, etc. in igneous rock, gneiss and migmatite in metamorphic rock, clastic rock and chemical sedimentary rock in sedimentary rock are commonly referred to as granite, which is generally hard. Similarly, marble, dolomite, limestone, limestone and serpentine are commonly referred to as marble in the field of stone industry and commercial circulation, which is generally soft.