Slate is a kind of stone, which can be used for architectural decoration. Maybe many people don’t know it. Generally, you know a lot about decoration materials, but the raw materials are not necessarily the same. Then, what is slate? How is slate formed? ? Next, let's take a look with the editor.

What is slate
Slate is a rock with a plate-like structure and basically no recrystallization. It is a kind of metamorphic rock. The original rock is argillaceous, silty or neutral tuff, which can be stripped into thin slices along the slab direction. It is formed by slight metamorphism of clayey, silty sedimentary rock or intermediate acidic tuff rock and sedimentary tuff.
The original rock has increased hardness due to dehydration, but the mineral composition is basically not recrystallized. It has a variable structure and a variable structure. The appearance is dense and hidden crystals. The mineral particles are very fine and difficult to distinguish by the naked eye. There are often a small amount of sericite and other minerals on the board surface, which makes the board surface slightly shiny. Slate can generally be named in detail according to different color impurities, such as black carbonaceous slate and gray-green calcareous slate. In low-level thermal contact metamorphism, shallow metamorphic rocks with spot-like structures and plate-like structures can be formed, usually called "spotted rocks". Slate can be used as a building material and decoration material. In ancient times, slate-rich areas were often used as tiles.

How slate is formed
The formation of slate is the same as sandstone. It is formed by the movement of the earth’s crust, sand and cement (siliceous material, calcium carbonate, clay, iron oxide, calcium sulfate, etc.) after long-term compression and bonding under huge pressure. Kind of sedimentary rock. The current colors are mainly light blue, black, light green, pink, brown, light gray, yellow, etc. Slate is not only rich in texture, but also hard in texture, quaint color, low water absorption, no radiation pollution, and has the characteristics of matte, non-slip, acid and alkali resistance, fire and cold resistance, weathering resistance, and good compatibility.
The main mineral composition is mica, followed by chlorite, quartz, and a small amount of pyrite and calcite. The new type slate has higher sand content, more calcium and pyrite, and hard lithology. The ore body is calcareous sericite slate and fine ore sericite slate, with a single layer thickness of 1-5cm.
Shallow metamorphic rocks are formed from clayey, silty sedimentary rocks or intermediate-acid tuff rocks and sedimentary tuffs after slight metamorphism. Black or gray-black. The lithology is dense, with plate-like cleavage developed. There are often a small amount of sericite and other minerals on the board surface, which makes the board surface slightly shiny. There is no obvious recrystallization. Under the microscope, some mineral crystal grains such as quartz, sericite, and chlorite can be seen unevenly, but most of them are cryptocrystalline clay minerals and carbonaceous and iron powders. With variable redundant structure and spot-like structure.
The protolith with plate-like structure is mainly argillaceous rock, argillaceous siltstone and intermediate-acid tuff. Slate is a low-level product of regional metamorphism, and its temperature and isotropic pressure are not high, and it is mainly affected by stress. A metamorphic rock with shale and silty composition as the main component and plate-like cleavage development with shale and silty composition as the main component. Slate with dense structure and well-developed slate It can be used as building stone, stele, inkstone, etc.
Over the years, many facts have proved that natural stone has become one of the most popular flooring materials. They have some potential properties and are very suitable for bathroom floor materials. Slate, as a natural stone, has inherent characteristics that make it an ideal bathroom floor material.