Gone are the days when alchemists used to transmute gold from lead. I made diamond from thin air.
Run a large amount of current on a specific amount of carbon gas inside an air-tight vault and shout; "Let there be light!" And there will be light.
This is a glow discharge plasma.
Suck all the air inside the vault to create a vacuum. You were told, "Diamonds form in extreme pressure." But with the use of alchemy, we only need patience.
Expose a thin silicon wafer in your glow discharge and let it stay there for 24 hours. And Voila! You got yourself a thin film of diamond on the silicon wafer's surface.
This is diamond.
(Dreamt 4 years ago; recalled Today)