Granite stone is. Granite is a mineral

GRANITE is a crystalline rock consisting of feldspar, mica and quartz.

Granites are a widespread rock found on all continents of our planet. Sometimes they come to the surface in areas composed of ancient rocks, where the overlying sediments have been destroyed as a result of erosion processes.

However, in most cases, the solidified magma from which the granites were formed does not reach the surface of the earth's crust and solidifies (crystallizes) at different depths, forming bodies of unequal shapes and sizes. Granite, as a rule, has a granular structure: from fine to coarse

Granite - natural complex in composition natural stone... Mainly formed from feldspars, mica and quartz

TITLE

Granite (from lat.granum - grain)

COLOR

It acquires different colors depending on the proportional combination of minerals. Has a rich color range: from black - to the traditional red-burgundy with black - to white and gray.

By the way, it is feldspar and quartz that create the “spotting” effect.

Granite is coarse-grained, medium-grained and fine-grained. This amazing stone has a rich color range: from the traditional red-burgundy version with black specks to white with gray splashes (and vice versa).

The most common granites are gray (Siberian, Gray Quenna) and black (Absolute Black, Nero Africa), but there are also rocks of pink-red (Rosso Marina), white (Mansurovsky), yellow (Zhiltau) and green ( Forest Green) tones.

PLACE OF BIRTH

Granites are a widespread rock found on all continents of our planet.

In the United States, granites are widespread along the Atlantic coast (from Maine in the north to Georgia in the south), compose large massifs in the north of the country, in the central Ozark plateau, in the Black Hills and the Front Range of the Rocky Mountains.

In Russia, there are about 50 deposits of granite, suitable for use as a piece stone, as well as rubble and rubble - on the Karelian Isthmus, in the Onega and Ladoga regions, Arkhangelsk and Voronezh regions, in the Urals, in Primorye and Khabarovsk Territory, Eastern Transbaikalia.

A large granite deposit is located in Ukraine. The Ukrainian crystal shield stretches across the entire territory of the country, from the northwest to the southeast. The width of its part, directly exposed to the surface, is 200 km, and the length is about 1000 km. It is on this strip that the main deposits of decorative stone are concentrated.

QUALITY

1.Longevity. The best grades of fine-grained granite begin to show the first signs of destruction after more than 500 years, therefore it is often called the "eternal" stone;

2. Strength. Granite is highly resistant to friction, compression and abrasion. It is a very dense (2.6-2.7 t / m³) and durable stone (its compressive strength is 90-250 MPa - twice that of marble);

3. Resistance to weathering and acids. Granite is an ideal stone for exterior decoration of buildings.

4.Waterproof. Granite practically does not absorb moisture (water absorption coefficient - 0.05–0.17%). That is why granite is perfect for facing embankments.

5. Environmentally friendly. Contrary to the prevailing prejudices, the natural radiation level of most granites corresponds to the 1st class - i.e. they are radiation safe and suitable for all types of construction without restrictions;

6. A wealth of textures. Unpolished, rough stone that absorbs light; polished to a mirror shine, showing the world a unique light play of mica inclusions - the decorative possibilities of granite can satisfy even the most complex design ideas;

7.Compatibility with other materials. Granite goes well with wood, metal, ceramics and other materials used in modern construction. It will "fit" into any interior - from classic to ultramodern;

8 rich color palette... The most common is gray granite, but there are also red, pink, orange, bluish gray, bluish green.

APPLICATION

In modern construction, granite is used so widely that it, without exaggeration, can be called a universal material.

Floors, stairs. Granite is a material with a very low level of abrasion. Even if 1 million people walk the stairs in your personal apartment in a year, they will be able to erase its steps by no more than 0.12 mm;

Various interior details. Window sills, cornices, baseboards, railings, furniture countertops, coffee tables, bar counters, balusters, columns - the high strength of granite will allow these items to remain safe and sound for many years, avoid mechanical damage due to temperature and humidity;

Facade and interior decoration. Granite is a very ergonomic material that can provide you with a comfortable stay in the building;

The elements landscape design... Alpine slide, rockery, Japanese gardens, decorative ponds - made of granite, these fashionable compositions will give your garden a natural and unique character.

Curbs, steps, paving stones. Granite is successfully used in places where great "endurance" is required. It is resistant to mechanical stress, chemical pollution and temperature changes - it does not change its properties during hundreds of freezing and thawing cycles.

Facing of embankments. Granite practically does not absorb moisture - accordingly, with a decrease in temperature, additional internal pressure from frozen water does not form in the pores of the stone, which can lead to the formation of cracks and destruction of the rock.

Granite paving stones. The use of granite paving stones has been counted for thousands of years. The famous ancient Roman cobbled roads can still be walked on today; cobblestone streets can be found in the old part of any of the European capitals; v modern cities stone roads are gradually replacing asphalt and concrete.

MAGIC AND HEALING PROPERTIES

Since primitive times, man has become accustomed to trusting a stone. This natural, lively, "feeling" material will relieve psychological stress, bring coziness, tranquility and comfort to your home.

Have you ever wondered about the origin of the expression "gnaw the granite of science"? Why, when we speak of diligent and capable students, do we remember granite, and not any other stone? It turns out there is an explanation for this. According to some observations, granite has the ability to stimulate human mental activity, helping to succeed in scientific research.

Granite- acidic plutonic rock of normal series from the family of granites. It consists of quartz, potassium feldspar plagioclase and micas - biotite and / or muscovite. These rocks are very widespread in the continental crust. The effusive analogs of granites are rhyolites.

The role of granites in the structure of the upper shells of the Earth is enormous, but unlike magmatic rocks of the basic composition (gabbro, basalt, anorthosite, norite, troctolite), analogs of which are common on the Moon and terrestrial planets, this rock is found only on our planet and has not yet been established among meteorites or on other planets of the solar system. Among geologists there is an expression "Granite - business card Of the Earth ".
On the other hand, there are good reasons to believe that the Earth arose from the same substance as other terrestrial planets. The primary composition of the Earth is reconstructed as being close to that of chondrites. From such rocks, basalts can be smelted, but not granites.
These facts about granite led the very first petrologists to formulate the problem of the origin of granites, a problem that has attracted the attention of geologists for many years, but is still far from a complete solution. A lot of scientific literature has been written about granite.
Bowen, the father of experimental petrology, became the author of one of the first hypotheses about the origin of granites. On the basis of experiments and observations of natural objects, he established that the crystallization of basalt magma proceeds according to a number of laws. Minerals in it crystallize in such a sequence (Bowen series) that the melt is continuously enriched with silicon, sodium, potassium and other low-melting components. Therefore, Bowen suggested that granitoids may be the last differentiates of basaltic melts.

Geochemical classifications of granites

The classification of Chappell and White, continued and supplemented by Collins and Valen, is widely known abroad. It contains 4 types of granitoids: S-, I-, M-, A-granites. In 1974, Chappell and White introduced the concepts of S- and I-granites, based on the fact that the composition of the granites reflects the material of their source. Subsequent classifications also generally adhere to this principle.
S - (sedimentary) - products of melting of metasedimentary substrates,
I - (igneous) - products of melting of metamagmatic substrates,
M - (mantle) - differentiates of tholeiite-basaltic magmas,
А - (anorogenic) - products of melting of lower crustal granulites or differentiates of alkaline-basaltoid magmas.

The difference in the composition of sources of S- and I-granites is established by their geochemistry, mineralogy, and composition of inclusions. The difference in sources also implies a difference in the levels of generation of melts: S - supracrystal upper crustal level, I - infracrystal deeper and often more mafic. Geochemically, S- and I have similar contents of most of the petrogenic and trace elements, but there are also significant differences. S-granites are relatively depleted in CaO, Na2O, Sr, but have higher concentrations of K2O and Rb than I-granites. These differences are due to the fact that the source of S-granites has passed the stage of weathering and sedimentary differentiation. The M type includes granitoids, which are the final differentiate of tholeiite-basaltic magma or the melting product of a metatoleitic source. They are widely known as oceanic plagiogranites and are characteristic of the modern zones of the MOR and ancient ophiolites. The concept of A-granites was introduced by Ebi. He showed that they vary in composition from subalkaline quartz syenites to alkaline granites with alkaline mafic colors, and are sharply enriched in incoherent elements, especially HFSE. According to the conditions of education, they can be divided into two groups. The first, characteristic of oceanic islands and continental rifts, is a differentiation product of alkaline-basaltic magma. The second includes intraplate plutons that are not directly related to rifting, but are associated with hot spots. The origin of this group is associated with the melting of the lower parts of the continental crust under the influence of an additional heat source. It has been shown experimentally that the melting of tonalite gneisses at P = 10 kbar results in the formation of a fluorine-enriched melt in terms of petrogenic components similar to A-granites and granulite (pyroxene-bearing) restite.

Geodynamic settings of granite magmatism

The largest volumes of granites are formed in collision zones, where two continental plates collide and the continental crust thickens. According to some researchers, a whole layer of granite melt is formed in the thickened collisional crust at the level of the middle crust (depth 10-20 km). In addition, granite magmatism is characteristic of active continental margins (Andean batholiths) and, to a lesser extent, of island arcs.

They are also formed in very small volumes in the mid-oceanic ridges, as evidenced by the presence of plagiogranite segregations in ophiolite complexes.

• hornblende
• biotite
• hornblende-biotite
• two-mica
• mica
• hypersthenic (charnockite)
• augite
• graphite
• diopside
• cordierite
• malacolite
• pyroxene
• enstatite
• epidote

According to the varieties of potassium feldspar, varieties are distinguished:

• micro-wedge
• orthoclase

The texture of granites is massive with very little porosity, characterized by a parallel arrangement of mineral components. According to the size of the grains that make up the rock of minerals, three granite structures are distinguished: fine-grained with grain sizes up to 2 mm, medium-grained - from 2 to 5 mm, and coarse-grained - over 5 mm. The grain size strongly influences the building properties of granite rocks: the finer the grain size, the higher the strength characteristics and durability of the rocks.
These rocks are dense, durable, decorative, and amenable to polishing; have a wide range of colors from black to white. Granite is characterized by a bulk density of 2.6-2.7 t / m3, a porosity of less than 1.5%. The ultimate strength in compression is 90-250 MPa and above, in tension, bending and shear - from 5 to 10% of this value.
Granite is a name for a clear-crystalline coarse, medium or fine-grained massive igneous rock formed as a result of slow cooling and solidification at a great depth of magmatic melt. Granite can also form during metamorphism, as a result of the processes of granitization of various rocks. Separate granite massifs are often attributed to magmatic, metamorphic, or even mixed origin.
The color is predominantly light gray, but often pink, red, yellow and even green (amazonite) varieties are called granite.
The structure is usually uniform-grained, most of the grains have an irregular shape due to constrained growth during mass crystallization. There are porphyry-like granite massifs, in which large crystals of feldspars, quartz and mica stand out against the background of fine- or medium-grained groundmass. The main rock-forming minerals of granite are feldspar and quartz. Feldspar is represented mainly by one or two types of potassium feldspar (orthoclase and / or microcline); in addition, sodium plagioclase - albite or oligoclase - may be present. The color of granite, as a rule, determines the predominant mineral in its composition - potassium feldspar. Quartz is present in the form of glassy fractured grains; it is usually colorless, in rare cases it has a bluish tint, which can be acquired by the entire breed.
In smaller quantities, granite contains one or both of the most common minerals of the mica group - biotite and / or muscovite, and in addition, dispersed dissemination of accessory minerals - microscopic crystals of magnetite, apatite, zircon, allanite and titanite, sometimes ilmenite and monazite. Prismatic hornblende crystals are sporadically observed; garnet, tourmaline, topaz, fluorite, etc. may appear among accessories. With an increase in plagioclase content, granite gradually transforms into granodiorite. With a decrease in the content of quartz and potassium feldspar, granodiorite is gradually transformed into quartz monzonite, and then - quartz diorite. The rock with a low content of mafic minerals is called leucogranite. In the marginal zones of granite massifs, where the rapid cooling of magma retards the growth of crystals of rock-forming minerals, granite gradually transforms into fine-grained varieties. Granite-porphyry refers to a type of granite consisting of separate large grains (phenocrysts) immersed in a finer-grained groundmass, which consists of small crystals, but still visible to the eye. Depending on the presence of minor, mainly dark-colored, minerals, several varieties of granite are distinguished, for example, hornblende, muscovite or biotite.
The main form of bedding of granites is batholiths, which are huge massifs ranging from hundreds to thousands of square kilometers and 3-4 km thick. They can occur in the form of stocks, dikes, and intrusive bodies of other shapes. Sometimes granite magma forms layer-by-layer injections, and then granite forms a series of sheet-like bodies alternating with layers of sedimentary or metamorphic rocks.

Application

The massiveness and density of granite, its wide textured possibilities (the ability to accept a mirror polish, in which a rainbow play of mica inclusions appears in the light; sculptural expressiveness of an unpolished rough stone that absorbs light) make granite one of the main materials of monumental sculpture. Granite is also used to make obelisks, columns and as cladding on various surfaces.

The oldest material, the constant companion of man, elegant and solid, expressive and varied, massive and eternal - those qualities that granite possesses - best material to create a human habitat. Your interior can become cold or cozy-warm, defiantly luxurious or modest, light or dark. Nature has created it so unique and varied that each product, fragment, or lined surface is unique. The main advantage inherent in granite is its natural hardness. An excellent material for external finishing of facades, steps and floors. A wide range of colors opens up unlimited possibilities for designers. Most breeds have low abrasion and water absorption. Under modern processing conditions, granite is cut and polished with diamond. In addition, you can achieve a mirror polish. It is a stone used in construction, which is the most resistant to storms, has a very high resistance to compression (from 800 to 2.200 kg / sq.cm).

It is used for facing columns, balconies, stairs, monuments, furniture, etc. Granite rocks - in common speech, in the technical and commercial sense, this name defines igneous rocks - both intrusive and effusive, with hardness and workability comparable to granite ... Their resistance to crushing and pressure is also very high in most cases. Also, gneisses formed by rocks of volcanic origin, which have the same or slightly different mineralogical composition with granites, are defined as granite rocks. That is, granite rocks used as building materials include, in addition to scientifically determined granites, syenite, diorite, gabbro, porphyry, liparite, trachyte, andesite, basalt, diabase, feldspathoid, gneiss, serizio, shale quartzite, serpentine and others. varieties and subspecies of the above-mentioned structures. Many of the breeds listed, from trachytes onwards, have commercial names derived from their use or manufacturer. No one would sell either trachyte, gneiss, serizio, slate quartzite or serpentine granite, either because of their characteristic appearance, which is often impossible to confuse with anything.

The rock defines here only the characteristics of hardness and workability, very different from those of marble. Ambiguity and ambiguity between commercial, technical and scientific names can arise, on the contrary, between granites, syenites, diorites, porphyries due to their appearance, which can be very similar to a layman and easily leads to deception, as due to old names, and because of the many layering in different types of rocks of the same family, or due to other reasons.

Rock Properties

• Rock type: Igneous rock
• Color: light gray, pink, red, yellow, greenish
• Color 2: Gray Red Yellow Green
• Texture 2: massive porphyry
• Structure 2: fine-grained medium-grained coarse
• Origin of name: from granum - grain

Rock Photos

Related Articles

• General information about granite massifs
  The Egyptians used very hard and massive rocks as a basis for the construction of their famous pyramids.
• 
  The main rock-forming minerals of granites are feldspar and quartz. Feldspar is mainly represented by one or two types of potassium feldspar.
• Application of granites
  Granite is one of the densest rocks. In addition, it has low water absorption and high resistance to frost and dirt. That is why it is used both indoors and outdoors. In the interior, it is used for decorating walls, stairs, creating countertops, columns and fireplaces.
• Eternal stone
  The advantages possessed by a natural stone in construction and sculpture, it is, first of all, strength and durability. In particular, the first signs of visible destruction a fine-grained rock begins to show in about four or six hundred years.

Granite. Climbers love him, even if he injures their flesh, steals their equipment, makes them feel insignificant. You probably know what granite feels like, its smell, and how it turns golden in the last rays of the sun, but here are a few facts you haven't heard of ...

1. The word "Granite" comes from the Latin granum, which means "grain". The distinctive, grainy texture of granite is formed by interlocking crystals that formed when molten rock slowly cooled beneath the Earth's surface, solidifying as discrete minerals of quartz and feldspar, as well as mica and small amounts of other minerals. The size of the crystals depends on how long the rock solidified. The slow cooling creates a coarse granite that you can't climb without plaster and gloves - like the granite found in Vedauwoo, Wyoming and Joshua Tree, California.

2. The color of granite mainly depends on the type of feldspar it contains. If the granite contains plagioclase feldspar, then its color is usually milky white. Alkaline feldspars range in color from brick red to emerald green to pale yellow, depending on impurities and trace elements. Pink granites owe their color to red or pink alkaline feldspars. Gray or white granite may contain white alkaline feldspar mixed with white plagioclase, but alkaline feldspar is not required at all, and such granites are technically called granodiorites or tonalites.

3. Granites form the world's tallest cliffs, including the northwest face of the great Trango Tower in Pakistan, probably the tallest 5,500-foot cliff. Trango consists of Baltoro granite, which also formed the Latok mountain group, which includes Ogre, Masherbrum and K7. Some of the walls in the eastern fjords of the Baffin Islands are similarly high, such as the Polar Sun Spire (wall height 4,700-5,000 feet). Other large granite walls and peaks include the Mont Blanc Massif, the Ruth Gorge in Alaska, the Bugaboos in Canada, and the Fitzroy and Pine Massifs in Patagonia.

4. The City of Rocks, Idaho, Cochise Stronghold, Arizona, Mount Lemmon, Arizona, and Little Cottonwood Canyon, Utah granites, although different, all formed at about the same time, about 30 million years ago, during what geologists call "igneous flares. ". During this time, the oceanic plate that went under North America collapsed, exposing the bottom of the North American continental plate for hot mantle rocks. This heating revealed new pockets of magma, and eventually created granite - called plutons - that can be found in the American West.

5. All the granite that is on the surface of the Earth at one time was raised from a depth, usually from one to 20 kilometers. If such granitic magma cools at the surface as part of a lava flow or volcanic eruption, it forms rhyolite or rhyolite tuff. This is how most of the rocks are formed at Penitente Canyon, Colorado, Owens River Gorge, California, and Smith Rocks, Oregon, for example.

6. Pegmatite is the most notorious "representative" in the Black Canyon of Colorado, and the composition of pegmatite is similar to granite. Pegmatites are identified by their extremely large crystals - anywhere from an inch or two across to over 20 feet. They rapidly grow from the smallest particles of magma into the granite system, and magma is often saturated with water and often has an unusual concentration of elements that are incompatible with the rest of the particles in granite crystals. So, when, next time you pull out a hold, inspect it before throwing it away: and all because of these very elements, because pegmatites very often keep rare gems and minerals such as aquamarine, emerald, and tourmaline.

7. The highest granite mountain in the world is Kanchenjunga (8586 meters), which is the third highest in the world, after Everest (8848 m) and K2 (8611 m). Kanchenjunga, along with the neighboring peaks Makalu and Jannu, is built from a 2.5-mile thick sheet of light-colored granite that formed from molten rock deep in the crust of the Himalayas. The summit of Everest, on the other hand, is made of limestone. And the slopes of K2 are carved from gneiss rocks.

8. El Capitan granite is different from Half House granite. El Capitan granite is 102 million years old and interspersed with diorite, a dark-colored igneous rock visible on the southeastern wall. Half House is composed of minor granodiorites (i.e. it contains a higher percentage of feldspar plagioclase than real granite) that formed 87 million years ago. Both El Capitan granite and Half Doma granodiorite are part of the Sierra Nevada Batholith, a vast expanse of igneous rocks that formed in the bowels of a chain of volcanoes - similar to the modern Andes - that exist on the western coast of California about 100 million years ago.

9. Granite has a density of about 162 pounds per cubic foot, about two and a half times heavier than the same volume of water. Granite is the main component of the continental crust. Basalt, the main component of oceanic crust, is much denser at about 187 pounds per cubic foot. Sandstone of variable density, but typically around 137 pounds per cubic foot. By weight, all granite is approximately 50% of all oxygen.

10. Granite is radioactive. Like many other natural materials, it contains trace amounts of uranium. Some granites, however, can have 5 to 20 times the normal amount of uranium, a byproduct of radon gas, which can cause lung cancer. But don't worry about the significant radiation exposure from climbing in Yosemite. Of greatest concern are the poorly ventilated basements surrounded by soil with granite exits.

Granite is considered one of the strongest and most durable materials... That is why it has been so widely used since ancient times for the construction of structures, decoration of facades and the creation of monuments. Buy a monument in Minsk from this eternal natural material, able to withstand more than one century, you can follow the link.

Introducing Interesting Facts about granite.

1. Granite contains in a percentage ratio almost half of what we consume from the atmosphere - oxygen.

2. The hardness of granite retains its original properties for several centuries. No frost, no heat, no blizzard, no showers - such a stone is not afraid of anything.

3. Granite is also a sound transmitter. So, the permeability through it is 10 times faster than the permeability through the air.

4. When it comes to granite, many imagine a little joyful picture in black and gray tones.

However, today, this stone can please with other, brighter and more contrasting colors: red, yellow, orange, green. It turns out that the color is determined by the presence or absence of spar in it.

5. Fine-grained granite is considered the strongest and most resistant to all external destructive factors. That is why its average life span reaches 500 years.

6. Today, countries such as India, China and Italy are the main exporters of granite in the world.

7. And in Russia, by the way, there is its own "property" - a large building, created exclusively from unpolished marble.

And it is located in the Irkutsk region and is a railway station.

8. There is also an unusual mountain, completely covered with granite and competing with Everest - Kanchenjunga, almost 9 km high.

9. Porcelain stoneware is an "artificial" natural stone. It appeared relatively recently and was able to greatly facilitate the work of designers thanks to the various colors and textures of the material.

10. According to some reports, there is an opinion that small granite accumulations became "discoverers" in the creation and emergence of life on Earth. It is not known how much this is reality or myth, but some scientists are inclined to this opinion.

Other interesting facts about granite can be found on the Internet.

Granite is a deep, acidic, intrusive (underground) igneous rock of granular structure. The sizes of the grains, which range from a few fractions of a mm to a few cm in diameter. The main molecules of granite are potassium feldspars, acidic plagioclase and quartz, a small amount of dark colored minerals. Intrusive mountain granite is the most common.

What is granite made of?

The main rocks that are present in granite are: feldspars - the most common rock-forming minerals; they account for over 50% of the mass of the earth's crust. Feldspars belong to the aluminosilicates of the frame structure. By chemical composition feldspars are divided into 4 groups: plagioclase, potassium, potassium, potassium-barium.Feldspars can be represented in different colors:

• White
• grey
• yellow
• pink
• Red
• green

Quartz is a rock-forming mineral with a skeleton structure. It is characterized by cross-hatching on the edges of the prism. It is one of the most abundant minerals in the earth's crust. Variety of chalcedony, amethyst, morion. Quartz is usually found in erupted rocks - rhyolites. Quartz is used in instrumentation, optics as semiprecious stone... Quartz can have various colors: colorless, white, gray, brown, pink. The density of quartz is about 2.5 - 2.6 g / cm3. It is referred to as piezoelectric - that is, when deformed, it is able to induce an electric charge.

Mineralogical composition of granite.

Granite contains a wide range of minerals. Acid plagioclase are rock-forming minerals, aluminosilicates from the group of feldspars. Plagioclases are a series of minerals with extreme members, which are albite Na (AlSi3O8) abbreviated Ab and anorthite Ca (Al2Si2O8) (abbreviated An). Usually, the composition of the rock is designated by a number corresponding to the percentage of anorthite. Albit No. 0 - 10; oligoclase No. 10 - 30; andesine No. 30 - 50; labrador # 50 - 70; bitewnit No. 70 -90; anorthitis No. 90 - 100.

The main colors of granite. What determines the color of granite?

Minerals that make up rocks can have different colors. This is explained by the mineral composition of which the rock is composed. So if Si, Al, K, Na are present in the rock, then they will be colored in light colors (quartz, muscovite, feldspars). And if Fe, MgCa is present in the rock, then they will have a dark color (magnetite, biotite, amphiboles, pyroxenes, olivines).

Colors of minerals

What rocks do granite form?

Granite is a material that was formed from igneous rocks. Igneous rocks - are formed during the solidification of cooling magma both underground (intrusive) and on its surface (effusive). According to the alkali content, igneous rocks are divided into rocks of the normal series (that is, the ratio of the sum of alkalis to the content of alumina<1) , щелочного ряда (отношение >one). According to the content of silica, SiO2 can be acidic (silica from 67 to 75%), medium acid (from 67 to 52%) basic (from 40 to 52%) and ultrabasic (<40%)

What is made of granite?

Granite is a material used in the construction industry. But in order to use it, it must be processed and given certain sizes and shapes. After processing, this product is called crushed stone. It can be of various sizes, starting from 1 mm and ending with 120 mm (rubble stone). Also, crushed stone can be classified by shape, that is, by the content of cuboid grains. The cuboid shape of crushed stone directly characterizes the level of adhesion to the binders in the solution. The higher the cubicity index, the lower the consumption of crushed stone and other materials, since it is more compact, which means there will be slight shrinkage, and therefore the structure will have increased rigidity. One of the types of products obtained is granite screening or