Add this Bag of Lava Rock - 5 lbs. to your fireplace or fire pit. Use as a filler under fire glass or as the center of attraction. Our calculator will help you determine how much will be needed for your project!
This lava rock is created by gas-rich eruptions, these cinders are guaranteed fire-safe and work wonderfully in all outdoor fire features. Since these rocks are naturally formed, their size and shape varies, but on average are 1" pieces.