Description : Are igneous, metomorphic, or sedementary rocks radioactive?
Last Answer : Igneous, metamorphic, and sedimentary rocks are all formed different ways. Some of them are radioactive, but that would be a separate question. It's a little bit like, are ham sandwiches, peanut butter sandwiches, or ... wheat bread? It's not the kind of rock, so much as what's in it, that matters.