Lyon Grey Quartzite

Lyon Grey Quartzite is a fine-grained, dark gray natural stone renowned for its elegant appearance and robust properties. It features exquisite light ash-gray shades, neutral tones, and subtle veining, making it a popular choice for both aesthetic and functional applications. Quarried in China, this quartzite is valued for its strength and durability.

Physical and Mechanical Properties:

• Density EN 1936 : 2,690 kg/m³
• Water Absorption (by weight)EN 13755 : 0.12%
• Open Porosity EN 1936 : 0.18%
• Compressive Strength EN 1926 : 142 MPa
• Flexural Strength (3-Point Bending) EN 12372 : 26 MPa
• Abrasion ResistanceEN 14157 : 18 mm³
• Impact Resistance (Minimum Drop Height) EN 14158 : 46 cm
• Modulus of Elasticity (Static) EN 14580 : 50 GPa
• Thermal Expansion Coefficient EN 14581 : 6.1 × 10⁻⁶ °C⁻¹
• Mohs Hardness — : 7.0 – 7.5
• Knoop Microhardness — : 1,200 MPa

Chemical Composition (% by weight) 

• SiO₂ (Silicon Dioxide) : 93.0 – 94.5%
• Al₂O₃ (Aluminum Oxide) : 2.5 – 3.2%
• Fe₂O₃ (Iron Oxide) : 0.8 – 1.2%
• K₂O + Na₂O (Alkalis) : 0.8 – 1.0%
• TiO₂0.2%
• CaO + MgO : 0.3%
• LOI (Loss on Ignition) : < 0.5%

Mineralogical Composition (% by weight)

• Quartz : 91 – 94%
• Feldspar : 4 – 5%
• Mica (Muscovite/Biotite) : 2 – 3%
• Iron Oxides and Accessory Minerals : <1%

Usage:

Interior Applications:

• Countertops, backsplashes, and bathroom vanities.

• Wall claddings and flooring.

Exterior Applications:

• Facades, outdoor seating areas, and pathways.

• Suitable for areas with high exposure to elements due to its weather resistance.

Other Uses:

• Fireplace surrounds, tabletops, and as accent pieces in interior design.

Maintenance:

• Regular Cleaning:Use a mild detergent or stone cleaner; avoid acidic products.
• Sealing:Periodic sealing recommended to maintain surface quality and resist potential stains.
• Polishing:Sometimes required to restore natural luster, particularly in high-traffic areas.

Cutting Sizes:

• Typically available in slabs of various thicknesses, such as 2 cm or 3 cm.
• Tiles and cut-to-size panels can be custom ordered; common tile sizes include 30x30 cm, 60x60 cm, etc.

Common Surface Finish Options:

• Polished:High gloss finish that enhances color and veining.
• Honed:Smooth and matte, providing excellent slip resistance.
• Leathered:Textured finish that adds depth and character.
• Sandblasted:Slightly rough surface, enhancing slip resistance and adding an organic feel.

Lyon Grey Quartzite embodies both aesthetic appeal and structural integrity, making it a versatile choice for a wide range of design applications. Its durability, combined with low maintenance requirements, positions it as a favored material in both residential and commercial projects.