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 Grill Lava Rocks for Grilling, size 4-8cm, are irregularly shaped, porous reddish-brown gas BBQ lava rocks shown stacked together on a white background.
Lava Rocks for Grilling | Gas BBQ Lava Rocks size 4-8cm / 40mm- 80mm
71 reviews
from £14.99 GBP
A close-up of Black Rock Grill's 100% Natural Lava Rocks for Firepit (4-8cm) with bright flames among the rocks, set on a patio with green grass and part of a metal chair visible in the background.
Lava Rocks for Firepit | Lava Rocks 4-8cm / 40mm- 80mm 100% Natural
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
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
The Black Rock Grill Infrared Thermometer, with advanced laser technology, offers precise readings from -50℃ to 550℃. It includes two AA batteries and a color LCD display with temperature metrics and modes for cooking and industrial use.
Infrared Thermometer Digital Laser IR Temperature Gun -50℃~550℃ | Non-Contact, High/Low Alarm, Adjustable Emissivity, Color LCD Display for Cooking, Steak Stones, BBQ, Pizza Oven & Industrial Use
£48.00 GBP
The Black Rock Grill Heavy-Duty BBQ Grill Brush & Scraper (18” stainless steel) and bonus marinating oil brush are displayed on a white background, perfect for gas, charcoal, electric, infrared grills, and steak stones.
Heavy-Duty BBQ Grill Brush & Scraper – 18” Stainless Steel Grill Cleaner for Gas, Charcoal, Electric, Infrared & Steak Stone Hot Rocks – Bonus Marinating Oil Brush
£10.50 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.