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Midwest Hearth Tumbled Lava Rocks for Fire Pits, X-Large (3-5 in), 10 Lbs

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Availability: In Stock.
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Arrives Oct 4 – Oct 5
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Size: X-Large (3"- 5")


Features

  • SMOOTH TUMBLED FINISH, NOT JAGGED LAVA ROCK Unlike traditional porous lava rock, these stones are hand-tumbled to create a smooth, rounded shape with no sharp edges. The result is a clean, modern look that complements contemporary gas fire pits, fire bowls, and gas log sets beautifully.
  • EXTRA LARGE 3"5" SIZE FOR A DRAMATIC STATEMENT LOOK Each stone measures 3 to 5 inches, making them ideal for larger fire pits and outdoor fireplaces where smaller stones get lost. One 10-lb box covers approximately a 12"12" area in a single layer use 23 boxes for a full fire pit bed.
  • HIGH TEMPERATURE RATED IMPORTANT SAFETY NOTE Made from 100% natural volcanic lava stone that withstands extreme heat without crumbling, cracking, or discoloring. Safe for use with gas burners indoors and outdoors. Important: always allow stones to dry completely before use wet or damp stones can pop or crack when exposed to high heat. Not recommended for wood-burning fireplaces.
  • MIDWEST HEARTH A BRAND YOU CAN TRUST Midwest Hearth has been a trusted name in hearth and fire feature products for many years, serving thousands of satisfied customers across the US. Every order is packaged at our Minnesota facility, where broken or compromised stones are removed before your box is sealed. US-based customer support backed by a 30-day satisfaction guarantee.
  • VERSATILE INDOOR AND OUTDOOR USE Perfect for gas fire pits, propane fire bowls, modern gas log sets, and decorative fire features both indoors and outdoors. Stack stones above your gas burner to create a natural flame effect, or mix with other Midwest Hearth sizes for a layered, custom look.

Description

Midwest Hearth has been a trustedname in hearth and fire feature products for years, serving customers across the United States with quality stones and genuine expertise. We are a Minnesota-based company — not an overseas operation — and every order we ship reflects the care and standards our customers have come to expect. When you buy from Midwest Hearth, you are buying from a real US business that stands behind its products. Start by filling your burner pan with a layer of traditional jagged lava rock. This base layer covers the burner and pan, helps distribute gas evenly across the fire, and gives the tumbled stones a stable bed to sit on. Midwest Hearth black lava rock is ideal for this step. Once your base layer is in place, arrange your Midwest Hearth tumbled stones on top. Choose your preferred style — a full coverage look for a lush, dramatic effect, or a natural pile or stack for a more rustic feel. Be generous with the stones to achieve the look you want. For a 24-inch fire pit, plan on 25 to 30 pounds of tumbled stones for full coverage. Before your first use — and any time the stones have been exposed to rain or moisture — allow them to dry completely before lighting the burner. Wet or damp stones can pop or crack when rapidly heated, which is a safety hazard. A full dry in the sun or a low-heat warm up period will do the job. Once dry, light your fire and enjoy the warmth and beauty of your finished fire feature. Midwest Hearth provides high quality components and accessories for fireplaces, stoves, gas logs, fire pits, BBQ grills and more. Maintain your wood stove with Midwest Hearth's gasket kits, catalytic combustors, temperature gauges, and chimney cleaning accessories. Update and refresh your fireplace with our replacement fireplace screen curtains, decorative media and logs, chimney brushes and more! Upgrade your grill with our high-quality temperature gauges. Get those coals lit with fire starter squares. Season with our BBQ Rubs! Enhance the outdoors with our fire pit decorative lava stones, ceramic logs, gas components, colorful pebbles, and more!

Brand: Midwest Hearth


Material: Stone


Flavor: Natural Volcanic Lava Stones


Item Weight: 10 pounds


Item Form: Stones


Brand Name: Midwest Hearth


Unit Count: 10 Count


UPC: 645360706355


Number of Packs: 1


Model Number: MH Tumbled Stones


Manufacturer: Midwest Hearth


Manufacturer Part Number: MH Tumbled Stones


Flavor: Natural Volcanic Lava Stones


Item Form: Stones


Material Type: Stone


Item Weight: 10 pounds


Item Highlight: Natural Volcanic Stone, Smooth Tumbled Finish, For Propane & Natural Gas Fire Pits, Heat Resistant, Indoor or Outdoor Use


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 4 – Oct 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great product
Size: Medium (1" - 2")
Love these. Replaced our old stones with these an it immediately made our fireplace look more expensive and modern
Reviewed in the United States on June 30, 2026 by Amazon Customer

  • Fired up about these lava stones!
Size: Large (2" - 3")
We added these to our gas fire pit (on top of the lava stones that came with it) and it looks great! A much more modern look than the "rugged" lava.
Reviewed in the United States on July 28, 2026 by L. Muir

  • Rocks for a birdbath!!
Size: X-Large (3"- 5")
I bought these 3-5” lava rocks to use in a birdbath and the birds love them! So do the chipmunks! You can buy cheaper rocks but I got these because I wanted to offer my critters a maximum amount of grip to insure that they don’t fall in and drown. These rocks are spectacular and definitely worth the money!! The water pump is solar powered with a battery backup and the bowl is a porcelain serving dish, all bought here on Amazon. ... show more
Reviewed in the United States on June 30, 2023 by N. E.

  • Nice Lava Rocks
Size: Medium (1" - 2")
Tumbled to a smooth surface. Constant color. Look good in the fire pit. A bit pricey but good quality.
Reviewed in the United States on October 20, 2024 by Daryl francis

  • Happy w product
Size: X-Large (3"- 5")
Product is as said in color, size etc
Reviewed in the United States on May 24, 2026 by kflagg

  • 3-5 inch size Great fish tank decor
Size: X-Large (3"- 5")
I didn't want to spend the money for these lava rocks. You can get your typical red jagged lava rock pretty cheap, but I generally don't find this color, size, or shape locally. So I went ahead and spent the money, and happy I did. These rocks look fantastic in the fish tank, especially against a light sand substrate. Added bonus is that the pours promote the growth of beneficial bacteria. They do come out of the bag extremely dusty and look much lighter. I gave them a quick rinse in tap water and put them right in the tank. ... show more
Reviewed in the United States on August 7, 2023 by Gello

  • Perfect for my broil on my stove
Size: Medium (1" - 2")
It was exactly what I needed for my stove
Reviewed in the United States on May 1, 2026 by Ldm-77

  • Rock exploded after 10 minutes of flame
Size: Large (2" - 3")
They look fantastic, but after 10 minutes of direct flame a rock exploded and a 1" chunk hit me in the chin about 10 feet away. Thankfully it wasn't my eye and nobody was hurt! Edit: After 40 additional minutes they seem stable and no more have exploded. Thermal camera reads the temp at 1,032 degrees. Just bake them a while before you actually decide to be anywhere near them. ... show more
Reviewed in the United States on June 15, 2022 by Pat

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