Petalite baking stone?
Has anyone ever heard of the mineral called "Petalite"? It's a lithium feldspar that, when used to bake, radiates infrared rays that exceed that of a stone oven. It's supposed to create really good bread! I watched "Yakitate!! Japan" to find that out. Can I really use it in clay, and more importantly, can I use it to make a mold with volcanic rock? Please help me!