Certified stone

Building stone identification contains useful and practical information about a stone. As you know, there are different building blocks and each has its own unique properties. This variety in properties causes the stones to differ from each other in terms of use, appearance, price, and so on.

Certified stone

A certified stone is actually a stone whose characteristics have been determined after physical and chemical analyzes and tests. Each of the important characteristics and parameters in the rock structure is measured by special tests.

The importance of stone expertise

Expertise in stone can be considered very important in many ways. Types of building stones are mined all over the world, each of which differs greatly depending on the place of extraction, the type of stone, and so on. As we have said, these differences cause different characteristics in terms of rock strength, its appearance texture, porosity and..

For this reason, the best way to choose the right stone for any particular application and point of the building is to check its analysis and identification. This has led to the recognition of stone expertise as a very important and vital category.

How to identify and issue a certificate for a stone?

Stone identification is done based on various standards and classifications. In this section, we intend to take a closer look at this category. For this reason, we first introduce the main classification of stones below and then review the basic standards in the field of stone identification.

The rocks are divided into a general classification from a geological point of view into the following three categories:

Igneous rocks: Igneous rocks are rocks that are formed by the cooling and freezing of molten material in the subsoil. In these rocks, we see high strength, low water absorption and also acceptable resistance to corrosive substances. One of the most famous igneous building stones is granite.
Sedimentary rocks: Travertine is one of the most prominent sedimentary rocks. As the name implies, they are formed by the deposition of dissolved and floating materials in river water, sea, springs, and so on. Some marbles can also be classified as sedimentary rocks.
Metamorphic rocks: Metamorphic rocks are the result of changes in rocks such as igneous and sedimentary due to factors such as high pressure and heat. Marble, some marbles, porcelain and some granites can be known as metamorphic stones.

Lashtar marble

Important parameters in stone identification

Hardness of stone

First of all, rocks are in different conditions in terms of hardness. Naturally, the lower the hardness of a stone, the lower the cost of cutting and processing it. In contrast, hard stones are harder to cut and sanding them will be more expensive. Marble can be considered as one of the stones with medium hardness.

Volumetric mass

The volumetric mass, or density of the rock, actually depends on the compaction and density of the rock. High density of rock means that it is dense, low porosity and.. In contrast, the lower the volume of the rock, the more porosity is observed. The importance of volumetric mass is especially evident in facade stones. Because the lowness of this criterion makes the stone lighter and its suitability for this application.

Porosity

Empty spaces in the texture of a rock are called porosity. The degree of porosity has many effects on the quality of the stone and its properties. For example, the higher the porosity of a rock, the greater the amount of water absorption in the rock. High porosity also makes the stone lighter. Another strength is the parameter that is affected through the pores of the rocks.

Percentage of water absorption

Rocks are formed in different geographical locations. There are also different elements in the texture of rocks. This causes the amount of water absorption in building stones to be different from each other. Percentage of water absorption is considered as one of the important parameters in the rock identification. Because this feature can affect the durability of the stone, its use, price and..

Get acquainted with Azna crystal stone

Mechanical properties of stone in identity card

In addition to the above, mechanical specifications must also be included in the stone certificate. Some of the most

important features are:

Compressive strength: This property, which is often measured in megapascals, indicates the degree of resistance of the rock to the pressure of external forces. Usually, the stones that are installed in the floor of industrial and workshop environments must have high compressive strength.
Flexural strength: Another important feature of stone is its resistance to bending. Stones used in the buildingmust have acceptable flexural strength in order not to break and crack due to expansion and contraction of the building in heat and cold.
Abrasion resistance: The structure and texture of the rock as well as its constituents determine its abrasion

resistance. This parameter is especially important for the floor stones of stairs, corridors and entrances of busy places.

Different standards of building stone

Performing various tests and issuing stone certificates is done according to different standards. Some of these standards are limited to certain countries. For example, the CE stone standard is related to the European Union and the types of tile standards BS EN 12057, BS EN 12048 slabs, BS EN 771-6 paving stones, BS EN 1341 paving stones and دیده can be seen in it. The CE standard certificate includes items such as serial number, stone application, mine specifications, color, and so on.

Buy a certified stone

Now that you are familiar with the identity card of the stone and its importance, you will undoubtedly have more insistence on buying the identity card of the stone. This is a very logical and correct decision. Most of the ores extracted from Iran's mines, after detailed examinations and tests, have a certificate and you can check the standard tables of their analysis and have the best choice for your desired application.

Some products of Uranus stone industry : Spider marble stone ، Marshall Marble ، Dehbid cream marble ، Jaguar marble ، Marble Stone

Contact Uranus for more information.