FireStones for fire pits are for those with contemporary decor, for those with a modern flair, for those yearning for an alternative to the ubiquitous gas log , or for those who just want something different. FireStones are made from the same high-heat resistant ceramic-bonded refractory material we use in the making of our gas logs – they will not explode like real stones when placed in a fire. Standard ceramic fireplace stone sets are available 18″, 24″,36″, or in four different assortment packs. FireStone sets are used on our Custom Pan Burners (CS) for single face, double face and multi-sided fireplaces. Custom Embers Pan Burner (CXF) is for single sided fireplaces only.