Emperor Black Granite

Emperor Black Granite is a premium natural granite quarried in Zimbabwe, characterized by a deep, inky black to dark charcoal background and a dense crystalline structure. Its surface is distinguished by a uniform distribution of fine white to silvery mineral flecks, creating an elegant starry-night or galaxy-like appearance. Occasional subtle grey mineral tones add depth while maintaining the predominantly black visual character.

• Base Color: Deep black to dark charcoal
• Grain: Fine to medium-grained
• Texture: Dense, crystalline, granular
• Pattern: Uniformly scattered fine white/silver mineral speckles with occasional grey tones
• Appearance: Starry, galaxy-like, consistent and elegant

Physical & Mechanical Properties

• Water Absorption: 0.12–0.16 wt.%
• Density: 3,100 kg/m³
• Flexural Strength: 26.6 MPa
• Compressive Strength: 348.8 MPa
• Hardness: Approximately 6–7 on the Mohs scale

The reported test values may vary depending on the quarry, block selection, sample preparation, testing method, and laboratory conditions.

Mineral Composition

Typical mineralogical composition of Emperor Black Granite may include:

Mineral, Approx. Content (% by weight)

• Plagioclase Feldspar: 35–50%
• Quartz: 20–30%
• Pyroxene: 10–20%
• Biotite: 5–10%
• Amphibole: 2–8%
• Opaque Minerals / Magnetite: 1–5%

The mineral composition can vary between quarry locations and individual blocks. The high proportion of dark ferromagnesian minerals contributes to its deep black appearance, while quartz and feldspar produce the characteristic lighter flecks.

Chemical Composition

Typical chemical composition may approximately include: Chemical Component, Approx. % by weight

• SiO₂: 45–55%
• Al₂O₃: 15–20%
• Fe₂O₃ + FeO: 8–15%
• CaO: 5–10%
• MgO: 5–10%
• Na₂O: 2–5%
• K₂O: 1–4%
• TiO₂: 0.5–2%

Chemical composition is indicative rather than a certified laboratory analysis and should not be presented as a quarry-specific test result without an official TDS.

Hardness & Durability

Emperor Black Granite has high hardness, strength, density and abrasion resistance, making it suitable for demanding interior and exterior applications. Its very low water absorption provides good resistance to moisture penetration and staining when properly sealed.

Recommended Uses

• Kitchen countertops and worktops
• Bathroom vanity tops
• Flooring and staircases
• Interior wall cladding
• Exterior façades
• Building entrances
• Commercial and high-traffic flooring
• Fireplace surrounds
• Monuments and memorials
• Cemetery applications
• Outdoor paving
• Landscaping features
• Table and furniture tops

Maintenance

Emperor Black Granite is relatively easy to maintain. Clean regularly with a soft cloth or mop and a pH-neutral stone cleaner. Avoid strong acids, abrasive powders, bleach, and harsh alkaline cleaners, as these may damage the finish or affect the sealer.

For countertops and other frequently used surfaces, periodic penetrating sealing is recommended, particularly in areas exposed to oils, food, moisture, or staining agents. Wipe spills promptly and avoid using abrasive pads that could dull a polished surface.