Pietra Crey Marble is one of the best and highest quality dark marble stones and is famous in the world market as Pietra Grey. Lashtar marble extraction and mining complex is located in the south of Isfahan province. This stone, which is one of the strongest marble stones, has a very high compressive strength. Lashter marble has a light black background and white lines are also available in it. This stone has been welcomed by architects and designers for a long time. Currently, Lashter marble is processed and supplied in the form of tiles and slabs. In terms of appearance, Lashter marble is very similar to Najaf Abad black marble, Dehbid Spider marble, Negro black marble, Ti Ho black marble, etc., which has a much higher quality than its competitors in terms of density and strength.
With its beautiful and eye-catching appearance, Lashtr isfahan marble has gained a very favorable position as soon as it enters the country’s market. Also, due to the very reasonable price, this stone has been well received in the global market, and Lashter marble with the international name of Pietra Gray has a significant share in exports.
Features of Pietra Crey Marble:
- Very high density
- Excellent flexibility
- Good abrasion resistance
- High compressive strength
- Very high strength
- The price is right
- Very little water absorption and penetration
- Unique color and beautiful appearance
- And …
The mentioned positive features, along with the very reasonable price of Lashtar stone with the international and commercial name of Pietra Gray, have made this stone a serious competitor for foreign stones, one of the suitable options for use in luxury buildings, in the focus of attention of designers and Builders to be placed. Nowadays, the use of black stones in the interior design of the building is much more obsolete. With its beautiful white lines, Lashter black marble is used in many different cases such as cabinets, elevators, the space behind the TV and lobby, etc.
In the processing of Lashtar marble slabs, in addition to polishing, sanding is also done in various other ways, of which leather sanding and hammer sanding are the most famous methods.
Methods of processing and operation ofPietra Crey Marble:
- Sub polished
- Leather sole
- Hound
- sand blast
- an ax
- Tumble
Structural analysis of Lashtar marble:
| The desired amount | Water absorption | Special Weight | porosity | pushing resistance | Abrasion Resistance |
| MIN | 0/03 | 1/80 | petty | 600 | 2/20 |
| MAX | 1/50 | 2/80 | 2/50 | 2200 | 6 |
| Pietra Crey Marble | 0/42 | 2/77 | 0/44 | 1350 | 2/8 |
This stone is somewhat rare due to the limitation in the extraction and supply of copper, and also because of the major export and the high demand for this product, it is processed and supplied in a specific and limited manner. The use of Isfahan Lashter marble next to lighter stones creates a very beautiful and eye-catching combination that gives a special glory and effect to the space and building. In many interior luxury designs of this stone on the floor and walls of the building, next to white, cream and generally light stones, it creates a very beautiful combination.
Factors affecting the price of Pietra Crey Marble:
- The size and shape of the stone cup
- The type and nature of the stone
- Coup mining and purchase costs
- Cutting and processing
- Sort or classification of stone
- Cleanliness and minimal streaks on the surface of the stone
- Shipping costs
- And …
In the book matching operation, which includes two parts (book match) and four parts (formach), stone cutting and processing is done in such a way that the natural lines and veins in the slab stone are along each other or be symmetrical with each other. That is, like a butterfly or patterns of a carpet that are in symmetry and extension of each other, shawls and stone veins are paired next to each other. Mainly, slab stones that have book match and four match capabilities are processed in factories that are equipped with quality and up-to-date devices.
Advantages of buying stone slabs:
The processing and preparation of stone in the form of slabs has many advantages over the old methods, and apart from the beauty and eye-catchingness of the stone, the strength and lifespan of the stone also increases significantly. In this processing method, high-quality and modern devices are used for cutting and calibrating, as well as subbing and polishing the stone, and due to the epoxy work and the installation of a net behind the slab sheet, the possibility of breaking and crushing the stone is minimized. In general, the advantages of buying stone slabs are:
- More strength
- stunning beauty
- Higher processing quality
- Ease of transportation and loading
- Ease of stone selection
- The ability to create book match and form match pages
- Lighting capability (in marble or onyx stones)
- And …
In the production of Lashter marble slabs, if the appropriate equipment is used and the sub operation is carried out correctly, it will bring high quality and stunning beauty.
Uses and uses of Pietra Crey Marble:
- The interior of the building
- Paving the floor of the hall and reception
- the walls
- Stairs and under stairs
- Staircase and wall
- The walls and around the fireplace
- The edge of the elevator
- The space behind the TV (TV Wall)
- Hotels, arcades and luxury business complexes
- Lobby and building entrance
- counter and counter
- Cabinets and space inside the kitchen
- Vanities and stone art volumes
- Luxury bathrooms
- Master and luxury bathrooms
- And …
Pietra Crey Marble in the form of book match and form match:
In the book matching operation, which includes two parts (book match) and four parts (formach), stone cutting and processing is done in such a way that the natural lines and veins in the slab stone are along each other or be symmetrical with each other. That is, like a butterfly or patterns of a carpet that are in symmetry and extension of each other, shawls and stone veins are paired next to each other.
Lashter Isfahan marble slabs, due to having many lines on its surface, if cut by book matching method, have a very good matching ability and provide the possibility of forming book match and form match frames. Mainly, slab stones that have book match and four match capabilities are processed in factories that are equipped with quality and up-to-date devices.
Currently, Lashter stone is produced in the form of slabs and tiles. Considering the increase in the price of raw copper and other production costs, slab processing is cost-effective. Because it has less waste and using advanced devices, sub, epoxy, UV, etc. operations are performed on it. If the polishers are of good quality and the processing and subbing operations are carried out correctly, the polished and shiny surface of Lashtar stone will be more attractive.
