China Brown Rhyolite is a volcanic-origin natural stone characterized by its pale brown to earth grey base, adorned with darker, fluid-like flow patterns resulting from ancient lava movement. It is a fine- to medium-grained stone with a unique visual depth and natural rustic elegance, making it highly desirable for both interior and exterior architectural applications.

Texture & Pattern

• Grain: Fine to medium crystalline texture
• Texture: Slightly porous with a soft matte feel in natural finish
• Pattern: Linear or wavy dark brown-grey bands caused by lava flow layering
• Appearance: Earthy and organic with natural mineral shimmer in light

Physical & Mechanical Properties

• Water Absorption .... 0.35% – 0.65%
• Density .... 2.50 – 2.60 g/cm³
• Compressive Strength .... 120 – 150 MPa
• Flexural Strength .... 12 – 15 MPa
• Mohs Hardness .... 6 – 7
• Abrasion Resistance .... Moderate to high
• Porosity .... Moderate

Chemical Composition (% by Weight)

• SiO₂ (Silica) .... 70 – 78%
• Al₂O₃ (Alumina) .... 12 – 14%
• Fe₂O₃ (Iron Oxide) .... 2 – 4%
• K₂O + Na₂O .... 4 – 6%
• CaO .... < 1%
• MgO .... < 1%

Mineral Composition (% by Weight)

• Quartz .... 45 – 55%
• Feldspar (Plagioclase + Orthoclase) .... 35 – 40%
• Biotite/Muscovite .... 5 – 8%
• Other accessory minerals .... < 5%

Surface Finish Options

• Polished .... Enhances color and pattern; for interiors, wall cladding, vanities
• Honed .... Matte smooth; floors, kitchens, and bathrooms
• Leathered .... Soft textured; countertops, vanities
• Bush-Hammered .... Coarse anti-slip; outdoor paving and steps
• Flamed .... Rough, non-slip; ideal for outdoor facades, terraces
• Natural Split .... Rustic and raw; often used in wall cladding or landscaping

Cutting Sizes

Slabs:

• Standard: 240×120 cm to 300×180 cm (94”×47” to 118”×71”)
• Thickness: 2 cm (3/4"), 3 cm (1-1/4"), custom upon request

Tiles:

• 30×30 cm (12"×12")
• 60×30 cm (24"×12")
• 60×60 cm (24"×24")
• 80×40 cm (32"×16")
• Custom sizes available for projects

Usage Applications

• Interior flooring and wall cladding
• Facades and exterior paving
• Fireplace surrounds, countertops, vanities
• Landscape architecture and garden features
• Urban design (benches, stairs, planters, etc.)

Maintenance Guidelines

Sealing: Recommended, especially for exterior or wet-area use

Cleaning: Use pH-neutral stone cleaner; avoid acidic or abrasive products

Upkeep: Low maintenance once sealed; periodic resealing (every 1–2 years)