Skyflame10LB Natural Lava Rocks for Fire Pits, Fire Tables,Fireplaces, Garden Landscaping Decoration, Indoor and Outdoor Use, 3/4~1 Inch, Black Features:100% Natural Lava Rock ——- Made by Nature and hand picked and bagged. Lava rocks for fire pit are formed when magma rises to the surface during volcanic activity and cools on the surfaceHigh Temperature Resistance ——- Lave rocks withstand extremely high temperatures with high heat retention properties, will not break down, melt or crack in high heat settingsPackage Details ——- Each bag contains