Black Basalt 20mm 20kg Bag

£
 8.00 

20mm Black Basalt is a durable decorative gravel with a striking deep black finish, ideal for driveways, borders, paths and modern garden designs. Supplied in convenient 20kg bags, this hard-wearing stone darkens further when wet for a premium contemporary look.

20mm Black Basalt is a striking decorative stone known for its deep charcoal to jet-black appearance, making it a popular choice for modern and contemporary outdoor spaces. Supplied in convenient 20kg bags, this hard-wearing angular gravel is ideal for driveways, paths, borders, flower beds and feature areas.

Unlike mixed black decorative gravels, Black Basalt offers a much darker and more consistent finish, helping create a clean and premium look. When wet, the stone darkens further to an almost pure black colour, making it especially eye-catching after rain or when paired with water features.

Our 20mm Black Basalt is suitable for:

  • Driveways
  • Garden borders
  • Paths and walkways
  • Decorative landscaping
  • Gravel grids
  • Modern garden designs

Key Features:

  • Deep black decorative stone
  • Durable and hard-wearing
  • Suitable for driveways
  • Looks even darker when wet
  • Low maintenance
  • Supplied in easy-to-handle 20kg bags

Coverage Guide:

Each 20kg bag typically covers approximately 0.25m² at a depth of 50mm.

If you are unsure how much you need, feel free to contact us and we will happily help work out quantities for your project.

20kg

Buy now
Sample available for viewing

View a sample before you buy to make sure it's the perfect choice for your project. Get in touch to arrange a viewing.

View a sample before you buy to make sure it's the perfect choice for your project. Get in touch to arrange a viewing.

Delivery

We deliver Monday - Friday. Delivery for bulk bags is via a 18 tonne Hiab lorry which is 12 meters long 4 meters high and 3 meters wide.  Delivery made off the side of the lorry only and up to 8 meters from kerbside. Any deliveries made off the main highway will be completed at customers own risk and liability.

We deliver Monday - Friday. Delivery for bulk bags is via a 18 tonne Hiab lorry which is 12 meters long 4 meters high and 3 meters wide.  Delivery made off the side of the lorry only and up to 8 meters from kerbside. Any deliveries made off the main highway will be completed at customers own risk and liability.

Pre-order information

Pre-orders close every Tuesday at 1pm. Orders placed before this cut-off are delivered within 2–3 working days (typically Thursday or Friday the same week).

Orders placed after the Tuesday 1pm cut-off will be scheduled for delivery the following week. Please allow up to 7 working days for delivery in these cases.

Pre-orders close every Tuesday at 1pm. Orders placed before this cut-off are delivered within 2–3 working days (typically Thursday or Friday the same week).

Orders placed after the Tuesday 1pm cut-off will be scheduled for delivery the following week. Please allow up to 7 working days for delivery in these cases.

Returns

Please inspect your order upon delivery. If anything arrives damaged or incorrect, refuse the delivery and contact us straight away — we'll arrange a replacement or refund promptly.Once goods have been accepted, we're unable to accept returns due to the nature of bulk materials. Please note that natural variations in colour, size, and texture are not considered faults.

01227 915167 jandjaggregates@gmail.com

Pay in 3

Split your purchase into 3 interest-free payments with PayPal. Simply select PayPal at checkout — eligible customers will be offered Pay in 3 automatically based on their account and order value.Please inspect your order upon delivery. If anything arrives damaged or incorrect, and contact us straight away — we'll arrange a replacement or refund promptly.Once goods have been accepted, we're unable to accept returns due to the nature of bulk materials. Please note that natural variations in colour, size, and texture are not considered faults.

FAQs

Find answers to the most common questions about our products.

Need more help?

Reach out to our team for any other delivery questions.

Customer testimonials

Real experiences from satisfied customers

We have ordered multiple bits from J&J Aggregates and the service has been faultless. Super friendly, mega fast getting back to you (no matter the time of day) and quick and easy delivery. They are super competitive on price and the quality of the goods is fantastic! Jon and the team are brilliant and I will 100% use them again!

Fast Delivery.Good quality stones and grids.A very good price.Jackie and Jon worked out how much we would need for our job and were very helpful. Would rightly recommend them!

Thanks again for a speedy recovery, on time as promised and a fantastic price for materials. Highly recommend.

Delivered and communicated well. Top quality gravel

Great service and beautiful slate, very reasonable. Very happy. Thank you

Excellent service from the communication and the delivery highly recommended

Good price and friendly service amazing quality very happy

J&j aggregates, delived some really nice stones for my garden and driveway, they were quick to deliver and really helpful. Very reasonable on price, highly recommend.

Karl Bentley

Best prices around and quick, free delivery. Will be ordering more soon.

Christine Robson

Wow! This Company is leading by example. Very polite, professional and go above and beyond to keep you happy. Easy to select tour aggregate from a personal show of their samples, they even soaked them in water to show the great colours as well…

Dave Gifford

Fabulous service from initial enquiry to first class delivery next day. Fantastic price, good quality product, amazing communication. Thanks very much … will definitely use in the future.

missd

J&J have been excellent for a landscaping project I am delivering. They always answer the phone, provided samples for the customer to check, and delivered right on time with minimal fuss. After shopping around I have found they had the best prices as well! thanks, will be using them again!