Technical Data Sheet: Dark Emperador Marble
Technical Data Sheet: Dark Emperador Marble
Dark Emperador is a prestigious, deep brown marble characterized by its distinctive “spider web” white or light-tan veining. Originating primarily from Spain, it is a high-density, fine-grained stone favored for interior flooring, wall cladding, and vanity tops.
Physical and Mechanical Properties
The following values represent the standard technical characteristics of Dark Emperador. Please note that as a natural product, minor variations may occur depending on the specific quarry and block.
| Property | Unit | Value |
| Hardness (Mohs) | Mohs | 3 – 4 |
| Unit Volume Weight | g/cm3 | 2.70 – 2.73 |
| Density (Specific Gravity) | g/cm3 | 2.73 |
| Water Absorption (Atmospheric Pressure) | % by weight | 0.10 – 0.15% |
| Water Absorption (Atmospheric Pressure) | % by volume | 0.20 – 0.35% |
| Water Absorption (Boiling Water) | % by weight | 0.20% |
| Water Absorption (Boiling Water) | % by volume | 0.40% |
| Porosity | % | 0.30 – 0.50% |
| Compressive Strength | kg/cm2 | 900 – 1,150 |
| Compressive Strength (After Freezing) | kg/cm2 | 850 – 950 |
| Strength to Blow (Impact Resistance) | kg . cm/cm3 | 15 – 20 |
| Strength to Bending (Flexural Strength) | kg/cm2 | 100 – 150 |
| Ratio of Fullness (Solidness) | % | 98.5 – 99.2% |
| Degree of Pores | % | 0.8 – 1.2% |
| Average Abrasion Strength | cm3/50 cm2 | 18 – 24 |
Technical Summary & Recommendations
- Durability: While Dark Emperador has a high compressive strength, its Mohs hardness (3-4) classifies it as a soft stone. It is susceptible to scratching from sand or grit, making it most suitable for interior applications.
- Water Resistance: The exceptionally low water absorption rate (0.15%) makes it highly resistant to staining compared to other marbles, though sealing is still recommended to preserve its deep color and luster.
- Freeze-Thaw Stability: The high ratio of fullness and low porosity allow it to maintain most of its strength even after freezing, though it is primarily used indoors to avoid UV-induced fading of the rich brown pigment.
- Maintenance: Due to its calcium carbonate composition, the stone is sensitive to acidic substances (vinegar, lemon juicepH-neutral cleaners.