A night view of an erupting volcano with bright orange lava flowing down its sides. Sparks and ash are visible near the crater, contrasting against the dark sky, creating a dramatic and fiery scene.
The Multi Purpose Stone

Lava Rocks for Fire Pits, Aquariums, Plants & BBQ's

Discover our selection of Lava rocks that are available in various sizes to suit all your grilling needs. These versatile rocks enhance heat distribution and retention, ensuring optimal cooking performance.

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Black Rock Grills Lava Rocks for Grills, sized 4-8cm/40-80mm, have a rough texture and irregular shapes with various shades of brown and beige. Their porous nature and numerous holes enhance the grilling experience, making them ideal for gas BBQs.
Lava Rocks for Grill | Gas BBQ Lava Rocks 4-8cm / 40mm- 80mm
71 reviews
from 14.99 GBP
Black Rock Grill Lava Rocks inside a fire pit set alight
Lava Rocks for Firepit | Lava Rocks 4-8cm / 40mm- 80mm
from 14.99 GBP
close up image of aquarium lava rock with fish swimming round them
Lava Rocks for Aquarium | Aquascaping Natural Lava Rocks 4-8cm / 40mm- 80mm
from 14.99 GBP
close up pile of lava rocks
Lava Rocks for Plants | Horticultural Natural Lava Rocks 4-8cm / 40mm- 80mm
from 14.99 GBP
4 kg lava rock , red lava, 4-8cm in small pile
Large Lava Rocks 6 - 9cm / 60mm - 90mm
9 reviews
from 14.99 GBP
A collection of coarse Horticulture Aquascaping Lava Rocks by Black Rock Grill, sized 2-10mm and weighing 1KG, on a white background resembles dark brown instant coffee granules, perfect for creating textured underwater landscapes.
Horticulture, Aquascaping Lava Rocks 2-10mm, 1KG
1 review
5.99 GBP
Against a white background, Black Rock Grills Horticultural Lava Rocks form a mound of reddish-brown, porous volcanic rocks. These 1-2cm rough-textured stones vary in size and shape, enhancing water retention and making them perfect for hydroponic culture. Available in 20kg bags.
Horticultural Lava Rocks | Lava Rocks for Plants 1-2cm, 20kg
12 reviews
29.95 GBP
Two hands hold a Black Rock Grill Large Lava Rock (8-15cm), perfect for hydroponics, against a plain white background.
Large Lava Rock 8-15cm / 80mm-150mm, 1 Rock
6 reviews
6.00 GBP

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Lava Rocks for Fire Pits & Grilling

In addition to being essential for grilling, our lava rocks enhance outdoor firepits, fostering a welcoming ambiance for evening gatherings.

Lava Rocks for Horticulture


Lava rocks can assist you in your garden, they can reclaim the land, support plant growth in less soil, and improve water efficiency in greener areas. They are also great for hydroponic and aquaponic systems.

Lava Rocks for Aquariums

Lava stones are great for aquariums making tanks look natural and helping filter the water, another demonstration of their versatility.