Stanbroil Lava Rock Granules Stanbroil Lava Rocks will instantly give any fire pit an exotic, yet classy look. Naturally occurring, these Lava Rocks are formed as volcanic magma rises to the surface, cools and releases gases which gives these rocks their coarse surface. Because they are volcanic, they can withstand extremely high temperatures without sustaining any damage or crumbling. Our Lava Rocks may be used exclusively in a fireplace or fire pit or may be used as a base or filler for other ornaments such as fire glass or lite stones. Whichever way they are used, the resulting effect is truly fascinating. The best part is that they require no maintenance at all! Available in various sizes. Why is Lava Rock Used in Fire Pits? Reflects Heat Dries Quickly Protects Burner Distributes Flame Lasts a Long Time Requires Little Maintenance Can Withstand High Temperatures Cost-Effective and Widely Available Perfect for Fire Pit | Fireplace | Decoration | BBQ Grill Fire Pit & Fireplace Use Lava Rock Granules are often used in outdoor fire pits, fire bowls, fire tables and fireplaces. It can be used exclusively or with fire glass and gas logs. Decorative Use Lava rock is perfect for flower arrangements, vase fillers, walkways, water features, exposed aggregate flooring or walls, swimming pool areas and many other areas. Fish Tank Decorations And Other Lava rock stone is perfect for providing the ideal living environment for your aquarium because it has beneficial denitrifying bacteria. This bacteria will improve your water quality by reproducing and then removing nitrates. The lava rock can also be used for outdoor bbq gas grill to retain the heat under the cooking surface. HOW MUCH YOU NEED? Round Fire Pit Diameter (A) x Diameter(A) x Rock Depth (B) / 24 = Lava Rock (lbs.) We recommend a minimum 2” of lava rock depth for most installations. For example, a 24" diameter fire pit at the recommended 2” of lava rock depth: 24 X 24 X 2 / 24 = 48 lbs. Rectangular Fire Pit Width (A) x Fireplace Depth (B) x Rock Depth (C) / 19 = Lava Rock (lbs.) We recommend a minimum 2” of lava rock depth for most installations. For example, a 30" X 10" fire pit at the recommended 2” of lava rock depth: 30 X 10 X 2 / 19 = 31 lbs. Square Fire Pit Width (A) x Width (A) x rock Depth (B) / 19 = Lava Rock (lbs.) We recommend a minimum 2” of lava rock depth for most installations. For example, a 20" fire pit at the recommended 2” of lava rock depth: 20 X 20 X 2 / 19 = 42 lbs. Fireplace (Front Width (A) + Back Width (B) )/2 x Fireplace Depth (C) x Rock Depth (D)/19 = Lava Rock (lbs.) We recommend 2" - 4" of lava rock depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. Reflective Fire Glass Fire Glass Beads Fire Glass Diamonds Recycled Fire Glass Regular Fire Glass Polygon Fire Glass Add to Cart Add to Cart Add to Cart Buying Options Buying Options Add to Cart Customer Reviews 4.6 out of 5 stars 4,210 4.5 out of 5 stars 413 4.4 out of 5 stars 1,546 4.5 out of 5 stars 19 4.6 out of 5 stars 476 4.3 out of 5 stars 69 Price $29.99$29.99 $29.99$29.99 $29.99$29.99 — no data — no data $26.99$26.99 Available Size 1/2 inch, 1/4inch 1/2 inch 1/2 inch 3/4 inch - 1 inch 1/2 inch, 1/4inch 1/2 inch Use for Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor