Lava rocks, also known as volcanic rocks or lava stones, are igneous rocks that originate from volcanic eruptions. They are formed when molten lava from a volcano cools rapidly, either as it flows or when it's expelled into the air.

Lava rocks are porous and lightweight, with a rough, jagged texture. They come in various sizes, typically ranging from small pebbles to larger chunks. Lava rocks are commonly used in landscaping, gardening, and as a decorative element in gas and propane fire pits or fireplaces.

In fire features, lava rocks serve as a heat diffuser. They help distribute the heat generated by the flame more evenly, preventing direct contact between the flame and other materials at the bottom of the fire pit or fireplace. This layer of rocks acts as insulation and protects the burner components from direct exposure to high temperatures, promoting a more controlled and efficient burning process.

Lava rocks are also valued for their natural appearance and durability, making them a popular choice for both functional and aesthetic purposes in outdoor and indoor fire features.