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Mr. Fireglass Lava Rock Granules, Large Black Volcanic Lava Rock for Fire Bowls, Fire Pits, Gas Log Sets, Indoor or Outdoor Fireplaces - 10 Pounds (2.75"-5")

4.5 4.5 out of 5 stars 354 ratings
$36.99
FREE Returns
2.75"-5"
Black
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Purchase options and add-ons

Brand Mr. Fireglass
Flavor Natural Wood
Item Weight 10 Pounds
Item Form Granules

About this item

  • 【Firebase To Improve Flame Performance】 - These black lava rocks have natural a porous surface, which can help spread the gas dispersion in all directions to improve the flame performance. It works great as a firebase underneath fire glass for fire pit or fireplace. While, it requires very little maintenance.
  • 【Natural Epic Decoration】 - With an earthy, natural look, Lava Rock complements many landscapes by adding texture, color, and depth. It works well as a transitional rock between two landscapes. It also does a wonderful job as mulch in garden bedsIt to cover the entire exposed aggregate flooring effectively hiding the unseemly pipes and tubes. It adds an extra beauty as decoration for any leisure spaces like garden, lawn, walkway, fountain, terrarium, vase filler, potted plant, craft project.
  • 【Activate Oxygen Ions in Water and Optimize Water Feature】- Natural volcanic rocks can activate the oxygen ions in the water and promote the metabolism of plants and animals. The porous structure can absorb harmful bacteria, residues, feces and harmful heavy metal ions to keep the water in the tank clean. Especially suitable for water features, shines in swimming pools, aquariums, water gardens, ponds etc.
  • 【Eco-Friendly & Safe to Use】 - Non-fading, non-degrade and non-toxic, Clean burning media for indoor and outdoor use around your home or business. Works great with propane and natural gas.
  • 【Black Lava Rock】 - Color Available in Black, Stone size in 2.75"-5". Weight: 10 pounds.

Customer ratings by feature

Easy to use
5.0 5.0
Style
4.4 4.4
Value for money
4.1 4.1
Accuracy
3.6 3.6
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Mr. Fireglass Lava Rock Granules, Large Black Volcanic Lava Rock for Fire Bowls, Fire Pits, Gas Log Sets, Indoor or Outdoor Fireplaces - 10 Pounds (2.75"-5")

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Product Description

Mr. Fireglass Lava Rock Granules, Large Black Volcanic Lava Rock for Fire Bowls, Fire Pits, Gas Log Sets, Indoor or Outdoor Fireplaces - 10 Pounds (2.75"-5")

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Mr. Fireglass Lava Rock Granules, Large Black Volcanic Lava Rock for Fire Bowls, Fire Pits, Gas Log Sets, Indoor or Outdoor Fireplaces - 10 Pounds (2.75"-5")
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Price$36.99$29.99$24.50$39.95$15.89$17.99
Delivery
Get it as soon as Sunday, May 12
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Get it as soon as Sunday, May 12
Get it as soon as Monday, May 13
—
Get it as soon as Sunday, May 12
Customer Ratings
4.54.5 out of 5 stars354
4.44.4 out of 5 stars111
4.54.5 out of 5 stars525
4.44.4 out of 5 stars626
4.44.4 out of 5 stars75
4.34.3 out of 5 stars460
Value for money
4.1
3.0
4.1
4.1
3.6
3.3
Light weight
3.6
—
—
3.8
4.5
4.0
Style
4.4
2.8
—
4.3
—
—
Sold By
Onlyfire Outdoor LLC
Onlyfire Outdoor LLC
Fry Oil Saver Company
MN Warehouse Deals
Yifeng Stroe
Skyflame Outdoor

Customer reviews

4.5 out of 5 stars
4.5 out of 5
354 global ratings

Customers say

Customers like the quality, appearance, size and performance of the solid fire fuel. For example, they mention it's rock solid, works great and that the size is perfect. That said, some complain about the color being off.

AI-generated from the text of customer reviews

11 customers mention11 positive0 negative

Customers are satisfied with the appearance of the lava rocks. They mention that they look really good, elegant, and nice. They also say that the rocks make the fire place look fuller.

"Very nice." Read more

"I put it in the fish tank. It's very good. The size is right. I can rinse it several times with clean water when using it, and it is very clean." Read more

"Really made my fireplace look great!" Read more

"Large quantity for not much money. All uniform size and they look great in my fireplace. I washed them all before placing them in my fireplace...." Read more

8 customers mention8 positive0 negative

Customers are satisfied with the size of the solid fire fuel. They mention that it has a good variety of sizes and that the particle size is perfect for their needs.

"I put it in the fish tank. It's very good. The size is right. I can rinse it several times with clean water when using it, and it is very clean." Read more

"Large quantity for not much money. All uniform size and they look great in my fireplace. I washed them all before placing them in my fireplace...." Read more

"Good variation of sizes, the stones aren’t very dusty and you get a lot for your money" Read more

"...It is exactly what I ordered, exactly the right size and will work great for my bonsai soil mixture. The .2-.3 mixture is perfect. Will buy again!!!" Read more

6 customers mention6 positive0 negative

Customers are satisfied with the quality of the solid fire fuel. They mention it's a good product and rock solid.

"...Weighed in closer to 6lbs and it was filthy. Seems like decent quality once I got it all washed off though." Read more

"...due to another persons review, however, I was pleasantly surprised with the quality and size of these lava rocks...." Read more

"Good Product" Read more

"Awesome product..." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the performance of the solid fire fuel. They mention that it works great for propane fire pits and bonsai soil mixture.

"Work perfectly. Have used several things with no popping like some previous rocks have done." Read more

"...what I ordered, exactly the right size and will work great for my bonsai soil mixture. The .2-.3 mixture is perfect. Will buy again!!!" Read more

"Work great for propane fire pit..." Read more

"Working Great..." Read more

3 customers mention3 positive0 negative

Customers are satisfied with the cleanliness of the solid fire fuel. They mention that the water was barely dirty, and the stones aren't very dusty.

"...can rinse it several times with clean water when using it, and it is very clean." Read more

"...I washed them all before placing them in my fireplace. The water was barely dirty." Read more

"Good variation of sizes, the stones aren’t very dusty and you get a lot for your money" Read more

8 customers mention0 positive8 negative

Customers are dissatisfied with the color of the solid fire fuel. They mention that it is not black but light gray, off color, and extremely light in color. Some customers also say that the product is not dark red-brown after washing.

"Be forewarned that while the description indicates “black” lava rock, it is grey...." Read more

"...It is extremely light in color, very light orange." Read more

"...It more of a gray color. Disappointing because the size is just right for indoor Fireplaces...." Read more

"Unfortunately the rock is not the color as described. It is not black but light grey. Will be returning" Read more

Work great for propane fire pit
5 Stars
Work great for propane fire pit
Bought these to replace the fake rocks in a propane fire pit. Over the last couple years the fake rocks got brittle and broke down. So I figured I'd try these they are great and put out more heat. I would suggest getting a bag of the smaller rocks to pour in first to fill up the area under the burner. then add this bag on top.
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Top reviews from the United States

TJ
5.0 out of 5 stars Nice looking
Reviewed in the United States on March 14, 2024
Size: 2.75"-5"Color: BlackVerified Purchase
Very nice.
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Jeremy Henry
5.0 out of 5 stars Work great for propane fire pit
Reviewed in the United States on April 29, 2024
Size: 2.75"-5"Color: RedVerified Purchase
Bought these to replace the fake rocks in a propane fire pit. Over the last couple years the fake rocks got brittle and broke down. So I figured I'd try these they are great and put out more heat. I would suggest getting a bag of the smaller rocks to pour in first to fill up the area under the burner. then add this bag on top.
Customer image
Jeremy Henry
5.0 out of 5 stars Work great for propane fire pit
Reviewed in the United States on April 29, 2024
Bought these to replace the fake rocks in a propane fire pit. Over the last couple years the fake rocks got brittle and broke down. So I figured I'd try these they are great and put out more heat. I would suggest getting a bag of the smaller rocks to pour in first to fill up the area under the burner. then add this bag on top.
Images in this review
Customer image
Customer image
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kebin hu
4.0 out of 5 stars Especially suitable for fish farming
Reviewed in the United States on April 24, 2024
Size: 0.4"-0.8"Color: RedVerified Purchase
I put it in the fish tank. It's very good. The size is right. I can rinse it several times with clean water when using it, and it is very clean.
Helpful
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Lisa Harris
5.0 out of 5 stars Awesome product
Reviewed in the United States on December 6, 2023
Size: 0.2"-0.3"Color: BlackVerified Purchase
Really made my fireplace look great!
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Ernest
5.0 out of 5 stars Smaller than expected but work out
Reviewed in the United States on December 24, 2023
Size: 0.8"-1.2"Color: BlackVerified Purchase
Bought for my gas outdoor fire pit were camper rather small but worked out
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C E Florian
5.0 out of 5 stars These are rock solid! Ha ha.
Reviewed in the United States on May 13, 2023
Size: 0.4"-0.8"Color: BlackVerified Purchase
Large quantity for not much money. All uniform size and they look great in my fireplace. I washed them all before placing them in my fireplace. The water was barely dirty.
2 people found this helpful
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volfangary
5.0 out of 5 stars Excellent Lava Rocks
Reviewed in the United States on November 12, 2023
Size: 0.4"-0.8"Color: BlackVerified Purchase
The media could not be loaded.
 Work perfectly. Have used several things with no popping like some previous rocks have done.
One person found this helpful
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GLenn
3.0 out of 5 stars Not Black but Perfect Size
Reviewed in the United States on January 9, 2024
Size: 0.3"-0.6"Color: BlackVerified Purchase
Be forewarned that while the description indicates “black” lava rock, it is grey. We managed to camouflage it by mixing it around with our existing landscaping black lava rock but it’s still noticeable to us.

We would’ve returned it but 3 bags were a bit heavy for me.
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Top reviews from other countries

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Nancy Parent Simard
1.0 out of 5 stars Plus gros que prévu
Reviewed in Canada on April 29, 2024
Size: 0.2"-0.3"Color: BlackVerified Purchase
La pierre est bien plus grosse que mentionné à la selection. Vraiment déçu...
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Lisa
5.0 out of 5 stars Don't recommend at all!!
Reviewed in Canada on March 5, 2024
Size: 2.75"-5"Color: BlackVerified Purchase
I've bought a few different brands of black lava rock but I have to say this is the first time I had to wash the rock just to find out its true color and if I had been shipped the wrong ones. They are more of a rust red color than black. Maybe speckled black lava rock would be a more accurate description.
Customer image
Lisa
5.0 out of 5 stars Don't recommend at all!!
Reviewed in Canada on March 5, 2024
I've bought a few different brands of black lava rock but I have to say this is the first time I had to wash the rock just to find out its true color and if I had been shipped the wrong ones. They are more of a rust red color than black. Maybe speckled black lava rock would be a more accurate description.
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Mom of 2
1.0 out of 5 stars False advertising
Reviewed in Canada on February 13, 2024
Size: 0.3"-0.6"Color: BlackVerified Purchase
The rocks are tiny compared to on-line photos - and the colour is off - they have brownish tinge.
One person found this helpful
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Lance
1.0 out of 5 stars These rocks pop like popcorn
Reviewed in Canada on October 4, 2023
Size: 0.3"-0.6"Color: BlackVerified Purchase
Take caution and cover
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