Provide your gas fireplace's faux logs with a realistic backdrop thanks to the Pleasant Hearth 5 lbs. Lava Rock. This set of lava rock is made from natural scoria, ensuring a natural look and a long-lasting design that won't soon be scorched away by the flames. Use this to help make your fireplace bed look more convincing, concealing burners and faux log supports cunningly. Intended for use with vented or fent-free gas logs.