Spindle Grey Sandstone is a distinctive quartzitic sedimentary sandstone quarried in China, appreciated for its elegant silver-gray background and natural wooden-textured darker veins, which mimic the flow and appearance of aged timber. This visual resemblance to wood, along with its durable quartzitic composition, makes it a preferred choice for contemporary architectural and landscaping applications. 

General Description

• Type: Quartzitic Sedimentary Sandstone
• Color: Silver-gray with medium grain
• Pattern: Darker gray to charcoal wooden-textured veins
• Appearance: Subtle flowing grain, reminiscent of aged wood
• Origin: China 

Texture & Pattern

• Grain: Medium-grain structure with a lightly rough natural texture
• Veining: Natural linear or curvilinear dark veins, giving it a wood-grain-like appearance
• Surface Feel: Gritty to fine-grained, depending on finish
• Visual Impact: Soft movement from veins offers depth and elegance 

Technical Properties (Test Results)

• Water Absorption .... 0.50% – 0.80% by weight
• Density .... 2500 – 2650 kg/m³
• Flexural Strength .... 10.4 – 13.1 MPa
• Compressive Strength .... 95.6 – 108.4 MPa
• Porosity .... Approx. 8 – 11%
• Mohs Hardness .... 6 – 7 (due to high quartz content)
• Slip Resistance (R Rating) .... R11 – R13 depending on finish

Chemical Composition (% by weight)

(Values may vary slightly depending on quarry bed)

• SiO₂ (Silicon Dioxide / Quartz) .... 87 – 92%
• Al₂O₃ (Aluminum Oxide) .... 3 – 5%
• Fe₂O₃ (Iron Oxide) .... 1.0 – 2.5%
• CaO (Calcium Oxide) .... < 1%
• MgO (Magnesium Oxide) .... < 0.5%
• K₂O & Na₂O (Alkali oxides) .... < 1%
• TiO₂ .... Trace amounts

Mineralogical Composition

• Quartz .... 85 – 92%
• Feldspar .... 3 – 5%
• Mica (muscovite, biotite) .... 1 – 2%
• Clay minerals .... < 2%
• Iron Oxides .... 1 – 2.5% 

Surface Finishes Available

• Natural Split (Cleft)
• Honed
• Sandblasted
• Brushed
• Tumbled
• Sawn
• Bush-Hammered
• Flamed

Each finish can impact slip resistance, color depth, and texture. 

Available Cutting Sizes (cm)

Tiles:

• 30 × 30
• 40 × 40
• 60 × 30
• 60 × 40
• 60 × 60
• Custom sizes upon request

Slabs & Cut-to-Size:

• Thickness: 1.5 cm, 2 cm, 3 cm standard
• Larger panels up to 120 × 240 cm available for wall cladding or paving

Custom formats for landscaping, coping, stairs, and sills

Typical Applications

• Interior flooring and wall cladding
• Exterior paving and facades
• Landscaping and garden pathways
• Swimming pool decks
• Feature walls and columns
• Stair treads and risers
• Fireplace surrounds

Its natural slip resistance and high durability make it ideal for both residential and commercial high-traffic zones. 

Maintenance & Care

Cleaning: Use pH-neutral cleaners; avoid acidic substances

Sealing: Recommended for wet or outdoor areas to reduce staining and water ingress

Resealing Frequency: Every 2–3 years (outdoor) or as needed

Routine Maintenance: Sweep or vacuum regularly to avoid abrasive wear

Advantages

Wood-like aesthetic with stone durability

High compressive strength and weather resistance

Good slip resistance for wet areas

Excellent resistance to wear and erosion