EXIR STONE GROUP
Pietra marble is a dazzling gray and black Iranian marble and is world famous. The Iranian name is Pietra Gray Marble. This gray / black marble is classified into different types based on the background color and the number of white streaks. Pietra gray marble is one of the most famous and best-selling natural stones in the world. And it is very similar to the Italian Pietra Gray stone.
However, the country of origin of Iranian marble is Pietra. But more marble is exported to the whole world. In addition, many stone quarries in China, Italy and Turkey produce this natural gray stone. Pietra marble is subjected to various processes and each of these types of processing has a specific application.
1- Interior Space, Paving Halls, Bath, Stairs
2- Interior fixture & Furniture
1-Mine
2- Grading
3-Dimensions and thickness
4-Quality
5-Color
6-Texture
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STRUCTURAL SPECIFICATIONS |
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| Stone Type | Weight | Variety of Texture | Variety of colors | The main color | Strength |
| Carbonate based | Medium | High | Medium | Gray, Black | High |
| Cold resistance | Sun resistance | Degree of smoothness and radiance | The degree of sub-susceptibility | Heat resistance | Adhesion with mortar |
| Low | Low | High | Very high | Low | Very high |
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STRUCTURAL ANALYSIS |
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| Optimal rate | Porosity | Specific gravity | Abrasion Resistance | Compressive strength | Water absorption |
| MIN | Petty | 2.5 | 2.5 | 500 | 0.3 |
| MAX | 2.5 | 2.8 | 6 | 1500 |
1.5 |
| Pietra | 0.44 | 2.77 | 2.8 |
1266 | 0.42 |
