- [Narrator] This is a synthetic diamond. It doesn't look anything like jewelry because that's not what it's for. We went inside one of the world's most innovative and closed off labs to see how it makes synthetic diamonds that are used to build everything from drills, to speakers, to lasers.It requires extreme conditions, like plasma heated to more than 3,600 degrees or pressures of 800,000 pounds per square inch. - Be effectively taking a Coke can and putting the Eiffel Tower on top of it. - [Narrator] Bu ...