Please tell me what kind of stone this is and how it was formed.

Granite Granite is an igneous rock formed by the condensation of magma below the earth's surface. Its main components are feldspar and quartz. The etymology of granite is the Latin granum, which means grain or grain. Because granite is a plutonic rock, it often forms well-developed mineral particles that can be discerned with the naked eye, hence its name. Granite is not easily weathered, has beautiful color, and can maintain its appearance for more than a hundred years. Due to its high hardness and wear resistance, in addition to being used in high-end architectural decoration projects and hall floors, it is also the preferred material for open-air carvings. Word definition editor 1. A type of igneous rock, the most widely distributed on the earth's crust. It is a crystalline rock mass formed by the gradual cooling and condensation of magma deep in the earth's crust. The main components are quartz, feldspar and mica. They are usually yellow with pink, and some are off-white. It has a hard texture and beautiful color, making it a good building material. Commonly known as granite. 2． Metaphor of Stubbornness: Granite Head. Introduction Editor Granite and basalt are both volcanic rocks. The difference is that when magma erupts, granite is the underground part and is formed under high pressure. Its texture is much tighter than the basalt formed after it erupts from the surface, so it is very hard. Huangshan was formed when underground granite was exposed to the surface during crustal changes. When the granite is exposed on the surface and is rising strongly, the flowing water cuts down along the vertical joint fissures, forming stone pillars or solitary peaks. The stone pillars and solitary peaks cluster together to form a forest of peaks, like the wonderful flowers in Huangshan Mountain. The granite peaks look extremely majestic. For example, Huangshan Mountain is cut 500-1000 meters deep, forming more than 70 peaks with a height of more than 1,000 meters. When the water flows down and cuts along the nearly vertical shear cracks in the granite body, a nearly vertical ravine is formed. The ravine becomes deeper and deeper, forming two walls facing each other. When looking upward, the blue sky looks like a line. This is a line of sky. Granite is a non-dissolvable rock and therefore cannot form the caves commonly found in limestone areas. However, rainwater washes along the fractures in the granite body, and the rock blocks in the upper wall of the fractures collapse, which can form irregular piles of holes. In addition, in areas where stone egg landforms develop, the gaps between stone eggs can also form caves. Such as the Water Curtain Cave, Lotus Cave, and Aoyu Cave in Huangshan Mountain. "Since ancient times, there have been many springs in famous mountains." Spring is an important tourist attraction in granite mountains. Such as the hot springs in Huangshan Mountain and the hot springs in Lishan Mountain. Granite generally contains very small amounts of radioactive elements. Therefore, the spring water flowing out of the granite generally contains a small amount of radioactive radon gas that is harmful to the human body. These spring water can be drank and bathed in. They are not only important tourism resources, but also valuable water resources. Most of China's granite landforms appear in the eastern region where there is abundant rainfall. The mountains are high and the water is high. Therefore, waterfalls usually appear in mountainous areas where granite peak forest landforms are developed or relatively developed. Such as the Renzi Waterfall, Baizhang Spring and Jiulong Waterfall in Huangshan Mountain. Main components Edit Granite is a plutonic acidic igneous rock formed by the condensation of magma deep underground. Some granite is a gneiss or mixed lithified rock formed by the metamorphism of magma and sedimentary rock. The main minerals of granite are feldspar, quartz, black and white mica, etc. The quartz content is 10% to 50%. The feldspar content is about 2/3 of the total, which is divided into orthoclase, plagioclase (soda lime) and microcline feldspar (potash). Different varieties have different mineral compositions, and may also contain pyroxene and amphibole. Granite is hard and difficult to be eroded by acid, alkali or weathering, and is often used as a building material. The etymology of granite is the Latin granum, and the Chinese noun granite was translated by the Japanese. Dictionaries and geology books from the early Meiji period translated Granite as granite or granite. Flower describes the rock as having beautiful patterns, while Gang or Gang means that the rock is very hard, which means a hard rock with flower-like patterns. Chinese scholars continue to use this translation. Morphological Characteristics Edit Although granite is a good material for construction, granite in some areas can leak radon, a natural radioactive gas. Radon can cause lung cancer. 13% of lung cancer deaths in Hong Kong are caused by excessive radon gas.

Coarse- or medium-grained intrusive rocks rich in quartz and feldspar are the most common plutonic rocks in the earth's crust, formed by the cooling of magma deep in the earth's crust. Granite mining was once an important industry due to its use as paving stones and building stones. Granite can be produced as dikes or rock beds, and is more representative of irregular rock masses with greatly varying scales. The main component is feldspar, plagioclase and alkali feldspar are generally abundant, and the relative abundance of the two becomes the basis for the classification of granite. In most granites, the ratio of the two types of feldspar here is less than 1/2. Falling into this category are most granites in the eastern, central, and southwestern United States, southwestern England, the Baltic Shield, western and central France, Spain, and many other areas. Plagioclase greatly exceeds the alkaline feldspar granitoids and is common in some areas of the western United States. Granites with alkali feldspar content that greatly exceeds plagioclase occur at many locations in New England, the United Kingdom, and the Oslo area of ??Norway, but they are all smaller rock bodies and are widely developed in northern Nigeria. Rocks containing less than 20% quartz are not called granite. The maximum content of dark minerals (ferromagnetic minerals) is approximately 20% (by volume). Less common minerals in granite are muscovite, biotite, hornblende, pyroxene or the rare fayalite. Biotite can occur in any type of granite and is usually present, although sometimes in small amounts. Sodium-containing amphibole and pyroxene (sodium amphibole, amphibole, neonite) are unique to alkaline granites.

If neither of the two types of feldspar is much more abundant than the other, then neither amphibole nor pyroxene is likely to be the main mineral; the dark mineral is usually biotite or muscovite, or both.

Formation process editor Granite is a structural rock that is formed by volcanic eruptions of lava and is bulged to the surface of the earth's crust in a molten state under considerable pressure. Some people also believe that it is the result of granitization caused by deep metamorphism and metasomatism. Many non-ferrous metal minerals such as copper, lead, zinc, tungsten, tin, bismuth, molybdenum, etc., precious metals such as gold, silver, etc., rare metals such as niobium, tantalum, beryllium, etc., and radioactive elements such as uranium, thorium, etc., are all related to granite. As the surface of the Earth's crust forms, it slowly moves and cools down. Igneous rock is a type of igneous rock. Igneous rock is a material formed by the cooling, solidification and crystallization of magma or molten lava containing silicate (Silicate) melt. When molten magma cools and solidifies, minerals such as olivine and pyroxene are formed in igneous rocks. Its densest iron-magnesium silicate minerals are formed when the magma is at its highest temperature; less dense minerals, such as feldspar and quartz, are formed in the later stages of cooling. Minerals formed in lava usually grow freely and have well-developed crystal forms.

Due to its high hardness and durability, granite is an ideal material for the production of wall tiles and floor tiles. Because granite is rarer than ceramic or any other man-made material, having granite floors can greatly increase the value of a large property. Granite is available in a variety of varieties and colors, providing customers with a wide range of choices. Granite countertops are easy to maintain and highly resistant to stains. Overall, granite floor and wall tiles provide users with an extremely durable and easy-to-maintain surface. In addition, unlike man-made synthetic materials, natural granite countertops have unique temperature resistance, so they are the first choice for all types of plate processing. Natural stone Amelink stone, marble fireplace, marble.

A kind of plutonic acidic igneous rock, which is a magmatic rock. Commonly known as granite. The silica content is mostly above 70%. Massive without bedding, granite mosaic structure, often subject to spherical weathering. The color is lighter, with gray-white and flesh-red being more common. It is mainly composed of dark minerals such as quartz (hardness 7), feldspar (hardness 6) and a small amount of biotite (hardness 2-4). The quartz content is 20% to 40%, and the alkaline feldspar is more than plagioclase, accounting for more than 2/3 of the total feldspar. Alkaline feldspars are various potassium feldspars and albite, and plagioclase is mainly albite or feldspar. The dark minerals are mainly biotite and contain a small amount of amphibole. With granite structure or porphyry-like structure. [1] Granite has a uniform structure, hard texture, and beautiful color. It is a high-quality building stone. Composition editor: Granite is a granular crystalline rock, and its main component ores are alkaline feldspar and quartz. Different varieties have different mineral compositions, and may also contain pyroxene and amphibole. Usually the content of feldspar is more than that of quartz, and the two interlocking structures can be divided into three categories: (1) Alkaline feldspars of different compositions are produced separately, (2) Alkaline feldspars of different compositions form a solid solution with the same shape. (3) It forms a solid solution with anorthite to form polyflakes and twin crystals, but 80-85% of them are albite. In petrology, alkaline feldspar refers to orthoclase, microcline, albite and albite or a solid solution synthesized from the above feldspar. The percentage of albite molecules contained in albite is not less than 80%. The molecular formulas of potassium feldspar (orthoclase or microcline feldspar molecules) and albite are represented by K (Al Si3O8) and Na (Al Si3O8) respectively. The molecular formula of anorthite is CaAl2 Si3O8. The components of anorthite and albite can form solid solutions in various proportions, which are the so-called plagioclase minerals or calcium-albites in mineralogy.

Based on the average proportion of different chemical components in 2485 granites from around the world, the weight percentages from heavy to light are:

SiO2 — 72.04%

Al2O3 — 14.42%

K2O — 4.12%

Na2O — 3.69%

CaO — 1.82%

FeO — 1.68%

Fe2O3 — 1.22%

MgO — 0.71%

TiO2 — 0.30%

P2O5 — 0.12%

MnO — 0.05% Classification Editor According to the types of minerals contained, it can be divided into black granite, muscovite granite, amphibolite granite, dimicite granite, etc.; according to the structure, it can be divided into fine-grained granite, medium-grained granite, coarse-grained granite, and porphyry granite. , porphyritic granite, geode granite, gneissic granite and black sand granite, etc.

According to the accessory minerals contained, it can be divided into cassiterite-containing granite, columbite-containing granite, beryllium-containing granite, lepidolite granite, tourmaline granite, etc. Autometamorphism such as feldsparization, greystone, and tourmaline is common. Granite is a widely distributed rock that has been produced in all geological eras. The shapes are mostly rock foundations, rock strains, rock bells, etc. Rock usesEdit General uses

The unique physical properties of granite and its beautiful patterns make it a good material for construction. It is known as the "King of Rocks", and some people use it to observe and measure. , listen three times, and try four times to evaluate whether it is good or bad. Granite can be used in construction from roofs to floors, as well as sidewalk curbs, and can be crushed into cement or rock fill dams.

Many places or items that need to be weather-resistant or long-lasting are made of granite. For example, the "Chiang Kai-shek Memorial Hall" sign in Taipei and the Monument to the People's Heroes in front of Tiananmen Square in Beijing are both made of granite. Granite remains durable over thousands of years, as evidenced by the famous Egyptian pyramids.

Granite has a uniform structure, hard texture and beautiful color. It is a high-quality building stone. The compressive strength varies depending on the stone type and origin, and is approximately 1000-3000 kg/cm. Granite is not easily weathered, has beautiful color, and can maintain its appearance for more than a hundred years. Due to its high hardness and wear resistance, in addition to being used in high-end architectural decoration projects and hall floors, it is also the preferred material for open-air carvings.

Commercial use

Commercial granite includes granite, gneiss, gneiss granite, granite schist and what scholars call syenite and granodiorite. the rocks in between. Gneiss-like rocks include mineral compositions similar to granite and have granular crystalline organizers. Commercial granite also includes other similar structures, feldspathic crystalline rocks containing a small amount of accessory minerals, mainly used for decoration, such as what petrologists call plagioclase. Gneiss is a coarse crystalline rock, mainly composed of silicate minerals, with a mosaic and granular crystal structure. Different types of minerals are arranged in regular or irregular alternating arrangements. According to the American Society for Testing and Materials classification, granite is divided into two types: ordinary granite and black granite. Ordinary granite is composed of quartz, feldspar, marble, etc., and is black or dark green due to colored minerals. Overall, its color is often affected by feldspar. The dark green or black rock of black granite is made of plagioclase, pyroxene, olivine, hornblende, etc. Therefore, black granite is divided into three types: hormonite, diabase, and basalt.