Kandla Grey Sandstone

Kandla Grey Sandstone is the most widely exported Indian sandstone in the world — and with good reason. Quarried from the Bhilwara and Boondi districts of Rajasthan across a 125-kilometre belt, this stone ships in daily volumes estimated at 800 metric tons to construction and landscaping projects in the UK, USA, Australia, Germany, and across Europe. At Stone Harbor, we source Kandla Grey directly from this quarry belt, processing it for export at the same high standard we apply to all our natural stone products.

What makes this stone so consistently in demand is not just its appearance — it is its performance. Kandla Grey is a hard-wearing, frost-resistant, and chemically stable stone with properties that suit the full range of outdoor applications in temperate and cold climates. It endures British winters, Australian summers, and everything in between.

Origin and Composition

Kandla Grey Sandstone forms over millions of years from the compaction of fine quartz grains cemented together by calcite and silica. The stone is predominantly quartz — approximately 80% — which accounts for its hardness, density, and chemical resistance. This high quartz content also gives it a natural resistance to acids, alkalis, and salinity, making it suitable for coastal construction where salt-laden moisture would degrade softer stones.

The grey colour ranges from light silver-grey to darker charcoal, with subtle beige undertones. For projects requiring strict colour consistency, the stone can be graded and supplied as Light Grey or Dark Grey. The natural variation between individual pieces is part of its organic appeal, not a defect.

Technical Properties

• Stone Type: Sedimentary sandstone
• Also Known As: Bhilwara Grey, Silver Sand, Pearl Grey, Cathedral Grey, Mountain Mist Sandstone
• Origin: Bhilwara and Boondi districts, Rajasthan, India
• Colour: Light to dark grey; subtle beige and charcoal undertones
• Quartz Content: Approximately 80%
• Porosity: 3.02% (low — excellent moisture resistance)
• Frost Resistance: Yes — suitable for freeze-thaw climates
• Chemical Resistance: Acid, alkali, and salinity resistant
• Density: Approximately 2.4 – 2.6 g/cm³

Available Finishes

• Natural Cleft: The quarry-split surface. Riven texture, excellent grip, ideal for outdoor paving.
• Honed: Smooth, matte finish. Popular for interior flooring and contemporary outdoor use.
• Polished: Reflective mirror finish. Deepens grey tones. For interior feature walls and flooring.
• Sandblasted: Textured surface with enhanced slip resistance. Preferred for pool surrounds and wet areas.
• Bush Hammered: Heavy texture for maximum grip. Commercial outdoor spaces and public areas.
• Tumbled: Aged, distressed look with softened edges. Popular for garden and landscape design.
• Flamed: Rough surface created by heat treatment. Exterior cladding and heavy-traffic paving.
• Sawn: Clean, precise cut with consistent surface. Standard for tiling and cladding.

Standard Sizes and Dimensions

• 29 x 29 cm | 29 x 60 cm | 60 x 60 cm | 60 x 90 cm
• 56 x 56 cm | 56 x 42 cm | 56 x 28 cm | 28 x 28 cm
• Project packs (mixed ratios) and custom single sizes available
• Thickness: 22 mm calibrated / 25 – 40 mm natural (hand cut and sawn)

Applications

• Outdoor Paving: Patios, driveways, courtyards, pathways, garden areas.
• Pool Surrounds and Decking: Non-slip natural surface ideal for wet environments.
• Wall Cladding and Facades: Residential and commercial exteriors; boundary walls.
• Interior Flooring: Living rooms, kitchens, hallways with a contemporary grey palette.
• Steps and Stair Treads: Structural integrity and natural grip without treatment.
• Window Sills and Coping: Clean grey tones complement both traditional and modern architecture.
• Landscaping Features: Retaining walls, raised beds, water features, garden edging.

Contact Stone Harbor to discuss your project requirements. Custom sizes, finishes, and export quantities available on request.