Here's the main thing you need to know about our ranked list of the 15 best diamond-selling hard rock and metal albums: They're all damn good. Are you surprised? History is littered with platinum ...

It used to take the Earth 3 billion years, 2,000-degree temperatures, a little carbon and a lot of pressure to grow a diamond. Now, a new machine can do it in five days. In Kerrville, Texas, a small ...