FireStones for those with contemporary decor, for those with a modern flair, for those yearning for an alternative to the ubiquitous gas log and 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 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.