fission matter assembler

All common matter is made up of protons, neutrons, and electrons. Fission of a molecule releases a neutron and two smaller molecules. These molecules vary in their radioactivity and composition but many are common elements that have emerged from a more complex element.

Direct the neutrons toward specific molecules and they will break in a very predictable manner and produce even more molecules. Do this enough times and i'll bet you could produce nearly every element below 1/2 the atomic weight of a uranium atom.

The drawbacks are that it will completely turn society on its head. Nothing would be precious or rare anymore, and money would no longer matter. Society would need to transition to a higher state of mutual progress, like in star trek :)