Lava Rock

Fire pit lava rocks are a great option to help enhance the ignition efficiency of your gas fire pit. They give your outdoor feature a rustic and natural look while putting a layer of protection between the burner and the flame it produces. Because lava rock is lightweight and porous, it allows natural gas or heavier propane to flow through and around each piece. The gas dispersion creates a more natural looking flame. Additionally, the high heat from the gas fire is far less likely to discolor your burner thank to the lava rock. 

So what exactly is lava rock? Is it really derived from volcanic stone? The answer is yes! Lava rock is formed from magma as it escapes a volcano in the form of a lava flow. As the lava cools and hardens, gas pockets are created in the surface. The resulting harvest is lightweight, porous rock! Lava rock is different from sedimentary stones such as shale, which has been formed by pressure squeezing it together over millions of years. The composition of lava rock makes it is more heat and fire resistant than materials like shale and river rock, which can expand, crack, and explode when under the duress of high temperatures. 

Check out some of the uses and features of our lava rock:

  • Lava rock is much more affordable than decorative fire media. Many of our customers acquire lava rock as a "filler" for the bottom of fire pits, bowls, and burner pans. Then, they top off their feature with a thin layer (approximately 2 inches) of fire glass, lava rock granules, volcanic stones, or lava fyre coals. Not only does this method promote better gas dispersion, but it also means our customers can generate a savings and still achieve a look that has depth and dimension.
  • When used in fire bowls, lava rock creates a buffer between the burner and the sides of the bowl. This keeps the fire bowl cool to the touch, even with a heavy flame. Maintaining temperature is important as certain materials may crack if exposed to hot spots.
  • Many people enjoy the look of lava rock because of its raw, earthy appeal. The uneven shapes coupled with the air pockets found throughout the surface of the rocks help the flames burn in a more natural pattern.
  • The surface pores also make lava rock a commodity in contained gardens! They promote the incorporation of air, water, and nutrients into the soil. Lava rock is a popular mulch because, unlike wood chips, it will never rot. (Please note: because it is porous, lava rock is buoyant. If it is not contained and subjected to large amounts of rainfall or water, it will float away.)

It can be tricky to figure out how much lava rock is safe to use in your fire pit or fire bowl. For help with this matter, start a live chat with one of our friendly customer service reps! 


Are lava rocks made from actual lava?

  • Yes. Lava creates many different types of rock forms as it cools but most 'lava rock' products are basalts. They form when air pockets are trapped inside the lava as it rises to the Earth's surface, cooling and expanding. So it is very much like a stone sponge with its porous quality and light weight. And since the lava rock is literally hardened molten fire, it can easily withstand the heat of your fire feature without breaking a sweat. 
  • Because of its porous properties, we urge caution to avoid using your fire features if the lava rock it wet. The water trapped in the air pockets will expand as the lava rocks heat up, increasing the risk of the rocks cracking and even exploding from the pressure.