When Superman wants to super impress Lois Lane, he takes a lump of coal and squeezes it in his super fist until it becomes a diamond. Which is super. Unfortunately, it’s not a scientifically accurate analogy for the creation of diamonds in nature. So when journalist Stephen Ornes’ 6-year-old son, Sam, asks how coal, which is black, can turn into diamonds, which are clear, there are actually a couple of issues we have to address.