American Fireglass Medium Lava Rock, 1/2" - 1" | Use in Fireplace, Fire Pit or Bowl | Outdoor & Indoor Volcanic Rock for Natu

4.6 4.6 out of 5 stars | 5,555 ratings

Price: 12.63

Last update: 01-11-2025


About this item

MEDIUM LAVA ROCKS: Our 1/2”-1” Lava Rock can be used on their own or as a filler in your fire feature. We recommend using lava rock as a filler if you have a deep fireplace or firepit. For a complete design, add fire glass on top to cover the fire rock thoroughly so it will not be detectable.
FOR FIRE PIT, FIRE BOWL OR FIREPLACE: Because lava rock is economical, it is the perfect choice as the first filler that goes into a very large and/or dept fire feature to cover up the gas piping and tubes. Once the lava rock is spread the way you want it, add a layer of fire glass to create a truly astonishing design that will instantly become the focal point of your home or yard.
LONG-LASTING: Lava rocks are volcanic so they can withstand the most extreme temperatures without any change in shape. They offer durability and provide a low maintenance and cost-effective natural element that looks great as part of your indoor or outdoor decor. They can be used with liquid propane or natural gas.
GORGEOUS & PRACTICAL: It does a great job of covering the floor of a fire feature, effectively hiding the unseemly pipes and tubes which are often visible in gas fireplaces or fire pits. This makes lava rock a more preferable alternative to the more common ceramic logs and fire stones. It can also be used in planters, landscaping, ponds and gardening.
QUALITY ASSURED: We sift, sort and pack all of our lava rock by hand. This way we can guarantee that they are top quality, can be used in a firepit. For optimal results, our recommendation is to pour a minimum of two inches of lava rock over the firepit burner, which allows the gas to filter evenly through the lava rock media.

Product information


Top reviews from the United States

Cameron
5.0 out of 5 stars Great Lava Rock!
Reviewed in the United States on February 1, 2024
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 Got this in two sizes, 1/8-1/2" and 1/2-3/4". Used the smaller as a substrate to set my burner on. The previous homeowner burned wood fires in a gas fireplace, so some of the fire brick was pitted. Used this to create a level surface. Also, after placing the burner, I filled in the area between the H-burner with this to create a level surface for my vermiculite. Worked wonderfully and created a beautiful result. Think of it as gravel, but the individual small rocks don't explode when heated. Very important for an indoor fireplace.

The larger size of lava rock I used to cover the burner and combined it with the glass. Glass and the lava rock were close in size and created, in my opinion, a very pleasing look. Some people like pure glass, some people like pure rock, I am in-between. You can use this as a substrate too, and cover it completely with about 20 lbs of glass in my case. Cuts down on how much glass you have to buy.
Customer image
Cameron
5.0 out of 5 stars Great Lava Rock!
Reviewed in the United States on February 1, 2024
Got this in two sizes, 1/8-1/2" and 1/2-3/4". Used the smaller as a substrate to set my burner on. The previous homeowner burned wood fires in a gas fireplace, so some of the fire brick was pitted. Used this to create a level surface. Also, after placing the burner, I filled in the area between the H-burner with this to create a level surface for my vermiculite. Worked wonderfully and created a beautiful result. Think of it as gravel, but the individual small rocks don't explode when heated. Very important for an indoor fireplace.

The larger size of lava rock I used to cover the burner and combined it with the glass. Glass and the lava rock were close in size and created, in my opinion, a very pleasing look. Some people like pure glass, some people like pure rock, I am in-between. You can use this as a substrate too, and cover it completely with about 20 lbs of glass in my case. Cuts down on how much glass you have to buy.
Images in this review
Customer image Customer image Customer image
Katherine E Hart
5.0 out of 5 stars Look great in my fireplace
Reviewed in the United States on April 16, 2024
Got one bag and it was plenty to cover the area in my fireplace under the faux logs. Elevates the look of my fireplace.
Kay
5.0 out of 5 stars Great for Orchids
Reviewed in the United States on January 28, 2024
Nope, these rocks aren’t anywhere near a fireplace. Neither are my orchids. I got these lava rocks because they were the right size and a great price. I don’t care how uniform they are, since they’re inside planters and mesh pots. As long as they don’t fall out, they’re big enough. Lightweight enough not to crush plastic pots, but heavy enough to balance top heavy plants.
I did rinse the rocks before using for repotting because of the dust to avoid clogging the roots. I rinse leca, too. No problem with chemicals, just dust that could harm roots/plants. These rocks work really well for epiphytes if that’s what you’re looking for. I have no opinion on their original use…
JT Oden
4.0 out of 5 stars Good material but Small Pieces
Reviewed in the United States on February 11, 2024
Good stuff. If you are debating what size, I recommend getting one size larger than what you think. There are many small, small pieces equal to or smaller than a marble.
Keenie
5.0 out of 5 stars Nice touch!
Reviewed in the United States on February 28, 2024
These met my expectations perfectly! Not too dusty either. These rocks helped make my fireplace look great!

They were easy to install. All I did was pour the rocks all around the outside edge of my fireplace for a finished look. Kind of like a picture frame if you will!

I probably could’ve gotten by with a smaller bag. I bought the 10 pound bag with a lot to spare. My fireplace is small and measures 17” deep, 20” wide in the back and 30” wide in the front.
Customer image
Keenie
5.0 out of 5 stars Nice touch!
Reviewed in the United States on February 28, 2024
These met my expectations perfectly! Not too dusty either. These rocks helped make my fireplace look great!

They were easy to install. All I did was pour the rocks all around the outside edge of my fireplace for a finished look. Kind of like a picture frame if you will!

I probably could’ve gotten by with a smaller bag. I bought the 10 pound bag with a lot to spare. My fireplace is small and measures 17” deep, 20” wide in the back and 30” wide in the front.
Images in this review
Customer image
eric
5.0 out of 5 stars Great size, color and value
Reviewed in the United States on January 20, 2024
I used this to cover the bottom and burner of my 32" fireplace. Used about 1.75 bags for full coverage. Would reccomend.
Customer image
eric
5.0 out of 5 stars Great size, color and value
Reviewed in the United States on January 20, 2024
I used this to cover the bottom and burner of my 32" fireplace. Used about 1.75 bags for full coverage. Would reccomend.
Images in this review
Customer image
RevolvingReviewsEverything
5.0 out of 5 stars Bring back the crackle and glow to your fireplace!
Reviewed in the United States on January 5, 2024
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 We resurfaced our fireplace mantle and wall but we forgot the most important part the fire. The fireplace is the original that came with the home 16+ years ago and so was the rock. The fire was meh… to say the least but leave it to Amazon for coming through again giving us the crackle and glow we so much desired. For less than $50 bucks I was able to bring back the glow and that cozy crackle effect we all love and crave. Great item! Easy to install and does the job wonderfully.
Y MdeV
3.0 out of 5 stars Smaller and dustier than I expected
Reviewed in the United States on July 24, 2023
The rocks are a lot smaller than I expected and came with a lot of dust. I do not have the time, but I am sure that if I went into the trouble of measuring, I would find a lot of them under 1/2" and not many of them close to 1". I should have gone with a bigger size. Once placed in the firepit, they do look OK, only smaller than the ones I had.

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