MAXIMUM TRUCKLOAD is 5 cubic metres (m3) PER truckload for this product.
Please complete your order and make another separate orders if you need 2 or more truckload.
 
 DELIVERY 
 Delivery cost is calculated at checkout based on your address and the distance required to deliver the products to you.
 
What is Basalt Stone 20mm
Basalt Stone 20mm is a crushed rock aggregate where the stone pieces are roughly 20mm in size. It’s known for its deep charcoal-grey to black colour, giving a sleek, modern aesthetic. Basalt is a volcanic igneous rock, extremely hard and durable.
 
What is Basalt Stone 20mm Made From?
Basalt stone is formed from rapidly cooled lava.
It’s dense and fine-grained, containing minerals like:
Plagioclase
Pyroxene
Olivine
The stone is quarried and then crushed and screened into various sizes, including 20mm aggregate.

Basalt stone won’t fade significantly, and unlike organic mulch, it doesn’t break down, so maintenance is generally low.
 
Benefits of Basalt Stone 20mm in Perth:
✅ Hard-wearing and long-lasting
✅ Elegant, modern dark colour
✅ Excellent drainage properties
✅ Low maintenance
✅ Resistant to Perth’s harsh climate
✅ Perfect for contemporary landscapes
 
Basalt Stone 20mm vs. Blue Metal 20mm:
 
Basalt Stone 20mm:
Typically darker, almost black
More premium, decorative look
Slightly higher cost
 
Blue Metal 20mm:
Blue-grey colour
Widely used for structural and drainage applications
Cost-effective
Top up as needed, especially in high-traffic areas.
Install edging to keep stones from migrating into lawns or garden beds.
Weed prevention:
Lay geotextile weed mat underneath
Spot spray or manually remove weeds
Blow or sweep leaves and debris off decorative areas for a clean look.
For driveways or high-traffic areas, combine with a solid base (like road base) beneath the basalt stone for proper compaction and longevity.
 
How to Maintain Basalt Stone 20mm
Rake occasionally to redistribute displaced stones.
 
Recommended Thickness for Basalt Stone 20mm Layers
Decorative cover for garden beds:
🔹 50–75 mm thick
Paths and driveways (loose stone):
🔹 75–100 mm for stability
Drainage layers:
🔹 100–300 mm, depending on application
Because of its hardness, basalt is resistant to weathering and abrasion.
 
What is Basalt Stone 20mm Ideal For in Perth, WA?
Basalt Stone 20mm has both decorative and practical applications:
✅ Driveways and paths → modern, stylish appearance with excellent durability
✅ Garden beds and landscaping → creates contrast with greenery
✅ Mulch alternative → long-lasting, no decomposition
✅ Drainage layers → excellent permeability
✅ Around water features → complements contemporary designs
✅ Ground cover for modern landscapes → reduces weed growth
 
In Perth specifically:
Perfect for low-maintenance gardens
Withstands Perth’s hot summers and heavy rains
Provides a dark contrast to Perth’s sandy soils and lighter paving tones.
 
Would you like to use Basalt Stone 20mm for a driveway, decorative landscaping, or another project in Perth? Let us know your plans, and we can help you calculate quantities or costs!