What the heck is soapstone? We'll tell you what it is. It's an amazing, dense, heat resistent rock that makes the best smudge bowls, offering bowls, and even scrying bowls. Native Americans have used soapstone for bowls, cooking slabs, smoking pipes and ornaments for centuries. Soapstone is formed with talc and micas, as well as other minerals, that create some of the most beautiful colorings. No two are alike. Talk about a gorgeous piece for the altar! This bowl will work with charcoal tablets, with or without sand. It will hold the heat, and keep your altar safe from the flame. Enjoy your new favorite smudge bowl.