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Fire Pit Lava Rocks in 10 lb Bags

SKU LAVA Category Tag

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Fire Pit Lava Rocks in 10 lb Bags

Lava rocks provide a rustic, earthy aesthetic, yet sits very well in both contemporary and traditional settings alike!

Naturally occurring, it is formed as volcanic magma rises to the surface, cools, and releases gases which gives these rocks their coarse surface. Because they are volcanic, they can withstand extremely high temperatures without sustaining any damage or crumbling.

PLEASE NOTE: The lava rock varies in color from brown to black, this is normal.

American Fire Glass meticulously processes, sifts, sorts, and then hand-packs the 10 lb bags, ensuring the highest standards of quality. Look no further, we supply the best lava rock for gas fire pits.

close-up of lava rock

Close up of Lava Rock


Available in three sizes – Small, Medium, and Extra Large.


Measures on average 1/8″ – 1/2″


Measures on average 1/2″ – 1″

Extra Large

Measures on average 3″ – 6″ 

Due to the chunk size of the Extra Large option, there may only be a few pieces per bag. The Bag however will still weigh 10lbs. 

We recommend using the smaller sizes as a base for the Extra Large Sized Rock! 

small lava rock - 10 lbs

Small Lava Rock

medium lava rock - 10 lbs

Medium Lava Rock

extra large lava rock - 10 lbs

Extra Large Lava Rock

How much do I need?

The easiest way to find out is by using our Fire Glass & Lava Rock Calculators. You can find the link at the bottom of the page. Measure your fire pit burn area in accordance with the detailed instructions, and input the data into the calculator. The result will provide you with the quantity (lbs) required.

Make sure you set the calculator for lava rock! As a rule of thumb, it is twice the volume per pound as fire glass. So you do not want to end up buying double your needs!

Yet another great reason to use it as a filler under your fire glass or Lava Stones, it is easier on the budget!

How to use Lava Rock

It may be used on its own in a fireplace or fire pit but may also be used as a base or filler for ornaments or other media such as Fire Glass or Fire Stones.

Whichever way they are used, the resulting effect is truly fascinating. 

The best part is that lava rocks require very little maintenance! See our article demonstrating how to use fire pit rocks.

When used with an American Fire Glass fire pit burner, their recommendation is pouring a minimum depth of two inches over your burner, enabling the gas to permeate evenly throughout the fire media. 

With other brands you will find their recommendations for fire media depth in the fire pit Installation Manual or User Manual.


White Stone Balls on lava rock base

White Fire Stone Balls on a bed of lava rock 

Used as a filler

Due to being the most economical fire media option, it is the perfect choice for use in large areas. But it will also help keep the costs down when used with smaller fire pit pans.

Cover the burner with the filler and then add a layer of fire glass for a splash of color or sparkle creating a truly spectacular look that will instantly become the focal point of your home.


Installing Fire Glass on Lava Rock

Used as a filler 

Prop 65Warning: This product can expose you to chemicals including LEAD AND LEAD COMPOUNDS, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

Additional information

Weight 10.0000 lbs
Dimensions 0.0000 × 0.0000 × 0.0000 in
Select Size

Extra Large ( 4 " to 6" rocks ), Large ( 1" to 2" rocks ), Medium ( ½" to ¾" rocks ), Small ( 1/8 – 1/2" rocks )


American Fireglass

In 2004 Matt and Kelly Doll started the business in their 400 square foot garage. From this two-person business, they now operate from a 20,000 square foot facility in Lake Elsinore, California, with a staff of more than 30. As a result of this rapid growth, American Fireglass has, for the last four consecutive years, featured in INC' Top 5,000 fastest growing companies. American Fireglass has become one of the industry leaders and one of the most trusted brands. Their dedication to providing the highest quality products, quality control, and product innovation has paved the way for others to follow. You may not have realized it, but it's likely that you have seen at least one of their products somewhere. American Fireglass products feature throughout the United States in some of the best-known restaurants, clubs, and hotels, not to mention a few celebrity's homes as well. You can see their fire glass in a fire pit at the Hard Rock Hotel in San Diego, and the M Hotel in Vegas. The Flamingo and the Hotel Lauberge Del Mar also feature some of their fire glass. If you order some fire glass for your fire feature, you will be in some pretty good company too. Barry Zito of the San Francisco Giants and Louis Castillo of the San Diego Chargers are two sporting superstar customers, along with Charlize Theron, Courtney Cox and David Arquette.

Customer Reviews

Based on 3 reviews
Chad Rhoton
Great Product

Love this Lava Rock highly recommend

Robin Murphy
Great Supplier with Technical Support

You might say why do I need support when buying fire pit supplies? There is a science to it and this guy knows his stuff! He will call you back promptly and advise you as to what you need. You don't get this kind of info at the patio store. The shipments are prompt and affordable.


Had a great experience with working with The Magic of Fire. Shipped quickly and just as described.