Description
M122L or Najafabad Black Marble is one of Iran’s high-quality and popular building stones, quarried from the mines of Najafabad County in Isfahan Province.
Technical and Chemical Characteristics of Najafabad Black Marble:
| Feature | Description and Values |
| Colour and Pattern | Black background with white or grey veins. |
| Specific Gravity | Approx. 2.7 g/cm³. |
| Abrasion Resistance | Moderate; suitable for low-traffic areas. |
| Varied Textures | Uniform texture with fine to medium grain. |
| Polishability | Excellent; highly polishable surface. |
| Finished Surfaces | Polished, honed, leathered. |
| Density | High; indicates strength and durability. |
| Compressive Strength | Around 100 to 150 MPa. |
| Water Absorption | Less than 0.5%; very low. |
| Porosity | Low; less than 1%. |
| Frost Resistance | Suitable for cold climates. |
| Acid Resistance | Resistant to mild acids like lemon juice and fermented dairy drinks. |
| Efflorescence Resistance | Excellent; due to low porosity. |
Applications:
Interior Spaces:
- Flooring
- Wall cladding
- Staircases
- Countertops
Exterior Spaces:
- Building façades
- Outdoor paving
- Landscaping
Stone Artifacts:
- Gravestones
- Countertops
- Washbasins
- Sinks
- Balustrades and columns
- Sculptures and statues
- Tables
Advantages:
- High durability and strength
- Resistant to abrasion and scratching
- Attractive appearance with a dark colour base
- Weather-resistant in various climates
Disadvantages:
- Relatively heavy
- Higher cost compared to some other stones
- Some sensitivity to strong acids
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