Classified as “industrial stones” are materials that have emerged as an engineering solution for a wide range of applications: interior and exterior paving and cladding, steps, tables, kitchen countertops, sills, finishes for bathrooms and furniture accessories.


Composite marble is the result of the combination of granulated natural marble and polyester resin. The resulting product has characteristics similar to those of natural marble, having a color uniformity, a durability and elasticity similar to those of natural marble.


General characteristics of composite quartz:


  • Composition: with quartz-based components
  • Standard dimensions for pavers and walls – 30 x 30 cm, 40 x 40 cm, 30 x 60 cm, 60 x 60 cm, 60 x 90 cm;
  • Maximum standard size – 184 x 124 cm or to order, nestandardizate.
  • thickness: 0.9, 1, 1.2, 1.5, 2.0, 3.0 cm
  • Coefficient of thermal expansion (- 6 – +10 grade C): 20 – 25
  • Degree of water absorption (% en masse): 0.02 – 0.04
  • Abrasion resistance (cm 3 / cm 2): 0.01 – 0.02
  • Bending strength (N / mm2): 53 – 69
  • Density (kg / dm 3): 2370 – 2410
  • Slip resistance by honing: 340 – 400
  • Chemical resistance (to acids): unchanged result
  • Frost resistance (% mass loss): 0
  • Combustibilitate: heavy fuel

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onyx, like the travertine, it is the result of the dissolution of the existing limestone, with the help of water and its repositioning as a new type of stone. In the limestone caves, onyx is made up of water droplets, as stalactites and stalactites. It is a very fine stone and quite fragile, which must not be installed in places with heavy traffic. This rock is characterized by translucency and can be enhanced by backlighting, creating true paintings of light and color. Its special structure consists of contrasting colors that give originality to the place where it is located. Autumn shades will be popular with designers / architects as this stone is easy to process and match with various materials., including wood.

General technical characteristics :

  • Apparent density: 2550 – 2728 kg/m3
  • Water absorption coefficient: 0,8 – 0.17 %
  • Abrasion coefficient: 4,32 mm
  • Dry compressive strength : 106,8 N/mm2
  • Compressive strength after 20 of freeze-thaw cycles: 102,5 N/mm2.
  • Breaking strength: 18 N/ mm2
  • MOHS hardness: 4


Through its translucent structure and thanks to its special colors and shades, onyx can be the optimal solution for creating truly unique ornamental works.


Onyx can be supplied in the form of slabs (with a thickness of 0.5 – 2 cm), in limited stocks.

Their strength is increased due to the technological procedure by which onyx blocks are injected with resin under vacuum, being then cut into reinforced slabs on the back with mesh.

Standard processing:

Polished, polished, scapitat, roughened, my son.

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Andesite is a igneous rock resulting from a volcanic eruption, which has a fine grain in various shades, from brown and purple to gray. Having a uniform structure, andesite is a very hard building material.

General technical characteristics :

  • Water absorption: 2,40 %
  • Compression strength: 0,1 g/cm2
  • Dry compressive strength: 120N/mm2
  • Compressive strength after 25 of freeze-thaw cycles: 100 N/mm2
  • Mechanical shock resistance: 3,5 N/mm2


Both adhesive-based assembly, as well as screed mounting can be used.


Andesite is also used as a building stone for paving roads. Due to its hardness, can be used for sidewalks, court, parking, plinths or facades.


Andesite can be delivered in the form of ballast, plywood or cubic stone.

Thick slabs: 2,3 cm

Plywood thickness: 1;2;5;10 cm

Standard processing:

Polished, polished, scapitat, roughened, my son.

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limestone or calcium carbonate is a sedimentary rock, dominant organogen, white, gray or yellow. The rock is composed mainly of the minerals calcite and aragonite both with the chemical formula CaCO3. The minerals that can be present in very variable proportions are clays (metallic or non-metallic hydroxylates such as aluminum, magnesium, iron, calcium, potassium and sodium), dolomite (CaMg (CO3)2), quartz, plaster and more.

Limestone is a rock with many variants, referring not only to the process of their formation, but also to the characteristics of the rock, as appearance or use.

The most famous limestone quarry in our country is found in Albeşti, Arges county. The rock here is yellow with gray and reddish hues. Monumental and architectural works were executed from the limestones exploited in Albeşti, among which: Arges Monastery, Peles Castle, the Royal Palace (the current National Museum of Art in Bucharest), Bucharest Central Post Office (the current Museum of National History in Bucharest), Arch of Triumph, Palace of Parliament and others.

The term limestone is used in differentiated technical or scientific language. E.g, the compact solid rock will be called limestone, while the porous rock is called chalk, while in the construction industry limestone is used as quicklime or the variant with a porphyry structure is called marble although the geologically true marbles are metamorphic rocks.

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Travertine it is a porous limestone rock, made of calcite, weak magnesium calcite and aragonite, which has a yellowish to brown color. Being a porous material, when closing the pores with cement dust and after sanding and polishing, travertine becomes as fine as marble. This rock has an uneven structure, slightly hunted, which makes it especially suitable for cladding, both inside, as well as outside.

General technical characteristics:

  • Apparent density: 2,4 t/m3
  • Water absorption: 1 – 2,4 %
  • Compression strength: 0,17 g/cm2
  • Dry compressive strength: 33,5 N/mm2
  • Compressive strength after 25 of freeze-thaw cycles: 23,5 N/mm2
  • Mechanical shock resistance: 1,65 N/mm2


Travertine can be mounted on both screed and adhesive.


Travertine is most often used for interior cladding, having a rustic look, warm. Because of the porous constitution that gives it a certain fragility, travertine can also be used for exterior cladding but in mild climatic conditions.


Slabs, plywood.

Standard processing:

Polished, polished, scapitat, roughened, antique.

Travertine comes in two structural varieties:

  • travertine compacte. They are dense and layered in thick banks (20-40 m) or in thin sheets, millimeter; they are white, cream-colored, Brown, which alternates throughout the crust. The stratification is assumed to be due to seasonal deposition, In the sense that in the summer the thicker and lighter bands were deposited, and in winter the thin, dark bands. These travertines are also known as cave onyx or marble onyx..
  • porous spongy travertines (also called “calcareous bushes”). These are white, and were formed by the biochemical deposition caused by the activity of aquatic organisms (especially blue algae), which retained carbon dioxide by photosynthesis (CO2) and caused carbonates to precipitate.

In general, travertine is porous. If the pores are closed with cement dust, by sanding and polishing, travertine takes on a surface as fine as marble.

The largest travertine quarry in our country is found in Banpotoc, Hunedoara county. The rock is yellowish-white and reddish-yellow. From the Banpotoc travertine, the sculptor Constantin Brâncuşi created two of his monumental works: The Table of Silence and the Kissing Gate.

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Granite is a massive igneous rock, with coarse grain (crystals up to a few millimeters in size), formed at great depths (thus being part of the plutonites), containing mainly quartz, feldspar or dark minerals.

The boundaries are formed by acidic magma rich in silicates, which comes from the depths (phenomenon favored by tectonic movements) and which near the surface of the earth (depth below 2 km) solidifies by slow cooling in cracks in the crust, sometimes several hundred kilometers in diameter.

Granite is the hardest building stone, used in tiles, occupying an important place among the dimensioned stones. Its hardness, weather resistance, its ability to be polished like a mirror, fascinating colors and textural patterns make this material extremely popular.

The main features of granite include, also, a large bearing capacity, abrasive and crushing power, the docility of cutting and modeling without secondary defects, ability to produce thin and / or large plates and – above all - durability, which is why it has obtained a special status among constructions globally.

In terms of physical properties, the borders are hard rocks, compact, with fine and / or coarse granules of metamorphic or volcanic origin, with the following characteristics:

  • Hardness: 6 – 7 on the Mohs scale
  • Density: 2.6 – 2.8 Kg/cm³
  • Compression strength: 140 – 210 N/mm²
  • How to break: 15 – 25 N/mm²
  • Water absorption: 0.1-0.6%
  • Quite low porosity
  • Weather resistant

In terms of chemical composition, the borders are igneous rocks composed of quartz, feldspar and minerals such as ferromagnesian cryolite, chlorite, garnet etc. A typical granite will have the following chemical composition:

  • Quartz (SiO2): 70-75%
  • Aluminum oxide (Al2O3): 10-15%
  • Calcium oxide (High): 0,5%
  • Peridotit (MgO): 0,5%
  • Bauxite (Ugly): 2-4%
  • Bauxite (Fe2O3): 2-4%
  • Alkaline: 4-6%
  • Peridotit (TiO2): less than 0,5%
  • Lose calcination (LAW): Less than 0,5%

In Romania, the largest granite quarry was located in Iacobdeal, Tulcea county, this has been known since the time of the Turkish occupation. The career has several fronts of work – in the valleys of Margarita, Serpents, The Italians and the Bachelor – arranged in the form of floors and connected to each other by means of inclined planes. The mined granite is gray, with shades of pink or pink with black or blue-green spots.

Agricin offers a wide range of materials from Spain, India, Turkey, China, Venezuela, Brazil, Finland, Norway or Zimbabwe, they have different sizes, thicknesses and finishes.

Description of terms used:

  • peridotitele – they are part of the rocks with a large granulation, formed in the layers of the earth's crust, located at a depth of 200 – 300 km, containing at least 40% olivină, the rest being composed of orthopyroxenes and clinopyroxenes, minerals with a high concentration of aluminum, magnesium, iron which depending on the temperature and pressure at formation are associated with garnet, spinel and less frequently plagioclase.
  • igneous rocks – are volcanic rocks formed by the solidification by cooling of magma from the upper mantle (asthenosphere) of the earth.
  • plutonitul – it is a body of igneous rocks, generally large, fixed by the intrusion and slow consolidation of magma in the mass of sedimentary layers
  • quartz – or natural silicon dioxide is found in unconsolidated rocks (like sand) or in the form of hexagonal crystals, transparent and colorless (in its pure state) or differently colored (when they also contain foreign substances)
  • feldspatul – it is a very common silicate
  • bauxite – is one of the most important aluminum ores and is composed mostly of aluminum-containing minerals

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Marble it is a metamorphic rock, composed mostly of calcite and obtained by limestone metamorphosis. From a petrographic point of view, the marbles are limestone or dolomite with well-developed calcite crystals due to the metamorphic processes to which they were subjected. The most common colors for marble are white, gray, Gray, black and red, generally due to the impurities contained (red from Iron salts, brown from those of Manganese, graphite gray etc), and the venulation is due to the numerous cracks later filled with secondary calcite.

Marble is formed from limestone under the action of heat and pressure over the years in the earth's crust. These pressures or pressure forces cause the limestone to change its texture and appearance, process called recrystallization. Fossilized limestone materials, along with minerals, recrystallizes and forms large grains, coarse calcite.

Impurities present in the limestone during the recrystallization period affect / modify the mineral composition of the marble. At relatively low temperatures, silicon impurities form quartz crystals. At higher temperatures, silicon dioxide reacts with carbonates to produce diopsides or forsterites. At very high temperatures, rare calcium minerals turn to marble. Other minerals may form in the presence of water. The presence of iron, Aluminum and silicon can lead to the formation of hematite and magnetite.

Minerals from impurities give marble a wide variety of colors. The purest marble in terms of calcite is white. Marble containing hematite is reddish in color, the one containing limonite is yellow and the one containing serpentines is green.

Marble cannot be easily divided into sheets of equal size and must be handled with care. Marble blocks are exploited by machines that cut ditches and make holes in the rock. The delimitation of a marble block by the miners is done by drawing ditches and holes. The block is detached with wedges and special machines, the blocks thus obtained are cut with saws to the desired shape and size, after which it is finished and polished according to the requests.

The general physical properties of marble are hardness, density, compression etc. Most marbles (with very few exceptions) have the following characteristics:

  • Hardness: 3 – 4 on the Mohs scale
  • Density: 2.55 – 2.7 Kg/cm³
  • Compression strength: 70 – 140 N/mm²
  • How to break: 12 – 18 N/mm²
  • Water absorption: less than 0,5%
  • Porosity: low

In terms of chemical properties, marbles are crystalline rocks composed mainly of calcite, dolomite or serpentine minerals, together with other minor components that vary from origin to origin. One of the most important is mentioned:

  • Where (High): 28-32%
  • Quartz (SiO2): 30 – 30%
  • Peridotit (MgO): 20 – 25%
  • Bauxite (FeO and Fe2O3): 1-3%
  • Lose calcination (LAW): 20-45%

Among the mineral impurities detected in marble we mention tremolite, actinolitul. gun, garnet, biotitul, talcum, fosterite etc.

The largest marble quarry in Romania is located in the Poiana Ruscai Mountains, Caraş-Severin county. The Rușchița quarry came into operation in 1884. The marble extracted here is white with shades of pink, bluish and gray, compact (98,11%), with small to medium saccharide structure, its special quality being appreciated abroad as well, being exported to France, Italy, YOUR, Germany, Austria, Hungary, Egypt etc. For the construction of the People's House – the current Palace of Parliament were used among other materials, 1.000.000 m³ of marble.

Agricin offers a wide range of materials from Italy, Greece, Spain, Turkey, India, Egypt, Iran or Lebanon, they have different sizes, thicknesses and finishes.

Description of terms used:

  • metamorphic rocks – they arise from other rocks through the process of metamorphosis (transformation) product of pressures, high temperatures that lead to an exchange of chemical elements
  • calcit – carbonate mineral very common in nature
  • limestone – also called calcium carbonate, it is a sedimentary rock, dominant organogena, white, gray or yellow. The rock is composed mainly of the minerals calcite and aragonite, both of which have a chemical formula (CaCO3).
  • dolomite – variety of limestone
  • hematite – natural iron oxide, very rough, red or brown, with semi-metallic luster
  • magnetite – black or dark gray iron ore found in eruptive rocks and has the property of attracting iron
  • lime – crystallized or amorphous iron ore, yellow-brown or reddish to black, consisting of hydrated iron oxide, clay and a little phosphorus
  • serpentine – mineral with varieties of different colors, resulting from the hydrolysis of magnesium silicate
  • peridotit – peridotites are part of large-grained rocks, formed in the layers of the earth's crust, located at a depth of 200 – 300 km, containing at least 40 % olivină, the rest being composed of orthopyroxenes and clinopyroxenes, minerals with a high concentration of aluminum, magnesium, iron which depending on the temperature and pressure at formation are associated with garnet, spinel, rarely plagioclase
  • bauxite – bauxite is one of the most important aluminum ores and is composed of most aluminum-containing minerals that: Gibbsit (Hydrargillit) Al (OH)3, Boehmit AlO (OH) and Diaspor AlO (OH). Bauxite may also contain iron minerals such as Hematite Fe2O3 and Goethite FeO (OH), as kaolinite clay minerals and minerals with a low titanium oxide content Anatas TiO2.
  • quartz – or natural silicon dioxide, which is found in rocks in an unconsolidated state (like sand) or in the form of hexagonal crystals, transparent and colorless (in its pure state) or differently colored (when they also contain foreign substances)
  • tremolit – natural calcium and magnesium silicate in the form of white crystals
  • actinolit – shiny green stone with elongated radial crystals
  • flint – natural variety of opal
  • grenade – natural calcium silicate, of magnesium, iron, of manganese, aluminum or chrome, used as a grinding stone or, in its pure state (red), as a semi-precious stone
  • biotit – small variety, green, brown or black
  • significance – natural hydrated magnesium silicate, white-green color, greasy and soft to the touch
  • fosterite – group of resins

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