Black 3/4 Inch Lava Rock | Fireproof and Heatproof Volcanic Lava Rock, Perfect for Fire Pits, Fireplaces, BBQs and More. Indoor and Outdoor use - Natural Stones | 10 Pounds IMPROVES FLAME PERFORMANCE by spreading the gas dispersion in all directions, ideal on its own or as a base layer underneath fire glass, or even mixing the lava and glass together. GAS COMPATIBLE, for use in indoor and outdoor natural gas and propane fireplaces and fire pits; perfect to replace faux fire log sets ECO-FRIENDLY AND SAFE for indoor and outdoor applications. No color additives or chemicals. HASSLE-FREE INSTALLATION: Lava rock is easy to install, simply pour straight from the bag into your fire pit or fireplace GUARANTEED HEAT-PROOF: Quality inspected and tested for use in high heat installations; 100% fireproof and will not melt or discolor with proper use