Our bulk bags are 1000kg
Bulk discounts available

Decorative Gravel

Black Basalt Gravel 20mm Bulk Bag


Black Basalt Gravel 20mm Bulk Bag

Qty From Qty To Unit Price
1 4 £105.00
5 9 £102.38
10 £99.75

Quantity: 1000kg (1 tonne) bulk bag.

Coverage: 1000kg of 20mm black gravel stones will typically cover 12m² (12m x 1m) at a depth of 50mm.

Consists of: 10mm - 20mm black basalt gravel.

Usage: Black basalt gravel is ideal for paths, driveways, borders, rockeries, and water features. Suitable for use in and around ponds as substrate or dressing due to being fish safe once washed to remove any contaminants.

Need loose load delivery? Call our team for more information.

01282 428211
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Please note: Whilst we take care to ensure our photography is representative of the products we sell, many consist of natural materials and therefore variations in colour and form may occur.

Our 20mm black basalt gravel - sometimes referred to as black granite gravel - provides a stunning contrast to garden planting, green lawns and a variety of architectural styles. A dynamic aggregate that's a neutral dark grey when dry before turning a shiny black when wet, black garden gravel has many uses and will transform your outdoor space. Regularly used on driveways, our black driveway gravel has proven itself as a stable and robust surface due to the angular black gravel stones that closely interlock. This also ensures stability underfoot unlike some larger aggregates that can be uncomfortable to walk on. Black basalt gravel 20mm is a truly versatile product that can even be used as a topping material on flowerbeds, borders and pots due to its inert nature. This also makes it safe for fish when used as a substrate or dressing material in and around water features - just ensure that the gravel is thoroughly washed to remove any contaminants prior to being laid.

20mm black gravel is a natural product that appears dark grey when dry and may vary in colour and size. Our bulk bags consist of stones 10mm - 20mm in size due to the mechanical screening process used.

Key features:
  • Dark grey when dry, shiny deep black when wet which makes for a stunning contrast to garden planting and green lawns.
  • Neutral grey/black colour is versatile and can be paired with a variety of architectural styles, from traditional to ultra modern buildings that benefit from a clean finish.
  • A hard-wearing aggregate that's suited to use on driveways and busy paths.
  • Angular stones that interlock readily and are stable underfoot.
  • Excellent drainage properties.
  • Can suppress weeds effectively by preventing light from reaching the sub-base below.
  • Our black basalt stones are inert and therefore safe for fish and can be used as a flowerbed or plant topping material.
  • Environmentally friendly and sustainable.
  • Contact us if you require loose load delivery.
  • Aggregate type:
    Black basalt gravel
  • Bag size:
    1000kg (1 tonne) bulk bag
  • Coverage:
  • Weight:
Based on 10 review(s)
Write an online review and share your thoughts with other shoppers!
John Jackson - Blackpool

Fantastic product and very helpful staff 5*****

I like it black when wet can't fault this product

Russell murray - Bacup

Nice aggregate

Black basalt, looks classy. Delivered on time by a helpful chap who put the tonne bags just where we needed them

Abu - Fulwood Preston

black Basalt Gravel

Lovely Product Even Better When Wet Brilliant Service Kept Updated Up To Delivery Very Friendly Delivery Driver More Than Helpful And Only Place I Found That Actually Gives You A Full Ton And Cheapest To Faultless Service Nothing To Hard For This Firm All The Reviews Proved This For Me

gene clifford - poulton le fylde

just the job.

Basalt chippings good match with existing chippings from elsewhere several years ago. Good price too compared to some other sources.

Brian - Burnley


It's dark, but not black. On delivery it looks pale, but after rain has washed off the dust it's almost black. Looks best when wet.

Colin Digby - Baxenden

Stone absolutely spot on

Everything and no dislikes

Gregg Norris - Poulton Le Fylde

Excellent product and service

Looks fantastic we had to order some more to finish off when delivered it was a different shade. Driver asked us if we wanted to keep it or if it was to go with stones already down he would take it back and re deliver from the quarry ours was from. Can’t rate company high enough!

Steve Galbraith - Aughton

Looks great dry, looks even better wet.

Fast and Efficient delivery as always.

John Simms - Bolton

Amazing Black Stone....Excellent company. Friendly when ordering over the phone and delivery driver extremely helpful. 5 stars!

Fantastic quality black basalt stone.

David Briggs - Rawtenstall

Excellent service

Gravel is perfect for what we needed but its the service that impressed me most and the driver who helped make life easy for us by driving down a lane he had to back up out of so that we didn't have to barrow the gravel. Wouldn't hesitate to recommend and will use again definately.