The diamond is the symbol of eternity, and with good reason. Diamonds are not only rare and spectacularly beautiful, but also enormously strong, forged under massive pressure and heat, ripped from the Earth by massive volcanic eruption and sent up, coming to rest in darkness, waiting for intrepic miners and speculators to bring them the rest of the way into the light of day.Diamonds actually form in the mantle, about 90 miles below the Earth’s surface — far deeper than the deepest hole ever dug by humans. Scientists believe that very nearly 100% of the diamonds we see today were…