20mm Black Granite

23kg small bags are 5 for the price of 4! 

Black granite is a 20mm sized dark stone that will help to make a striking statement in your garden. Hard wearing, this product is ideal for borders, water features, paths and gravel driveways. Please note - main image shows product in the wet, see second image for a representation of Black Granite when it is dry. Available in jumbo bulk bags, half bags, or 23kg small bags - see our bag size guide below.

All advertised stone sizes are nominal and some colour variation from main images may occur -  as part of the manufacturing process it is normal for this product to contain smaller pieces, fines and dust. This will wash off with a hose or with rainfall. 

Coverage

The average depth of gravel required for borders, footpaths or decorative garden areas is 50mm, however it may be a good idea to increase this to 75mm for driveways. We highly recommend using our helpful aggregate calculator to approximate the amount required for your project. Please note that these coverage measurements do not allow for compaction. 

• A full 850kg jumbo bulk bag will cover approximately 10-12m² at a depth of 50mm.
• A 450kg half jumbo bulk bag will cover approximately 5-6m² at a depth of 50mm.
• You'll need approximately three 23kg small bags to cover 1m² at a depth of 50mm.

View our bag size guide here 

Check out our gravel driveway guide

Black Granite is ideal to use on a driveway and we've written a comprehensive guide showing you how to build a gravel driveway from the ground up – literally. From digging out, creating a subbase and laying the stones!

An unrivalled range of decorative gravels

At AWBS we offer a huge range of different decorative gravels and shingles to suit many garden and driveway projects. Our unrivalled selection offers many different colours, types, shapes and sizes that all have a multitude of uses. Our decorative gravels can be used for borders, water features, front gardens and rockeries and we also offer many hard wearing gravels that will transform your driveway or garden pathway. At AWBS you’re sure to find a product suitable for your outdoor project.

Come and visit us

We have the vast majority of our decorative gravel range on show at our three branches in Oxford, Yarnton and Swindon so you can come in and view each product and even take away a free sample to help you decide which one to choose. If you’ve got any questions about any of our decorative gravel products, please don’t hesitate to get in touch. You can contact your local branch here!

Free delivery!

Don’t forget that AWBS offer fast, free delivery to local areas and we aim to deliver in stock products within 1-5 working days where possible. We fulfil our orders using our own fleet of vehicles that are driven by our highly trained delivery drivers. If you want to check if you qualify for free delivery, you can use our handy postcode checker.