di-Lithium crystals are impossible, i know that.
No problem…quite doable. Unfortunately the cost of transmuting an element from one thing to another is very expensive. It’s still a LOT cheaper to go dig it out of the ground for any element you care to name (unless it’s an ‘unnatural’ element such as californium in which case you have to make it).
Futurists love to talk about ‘meat machines’. These would be a sort of black box into which you would put raw materials (which could basically be compost) and out of which you would get beef. Nanobots would just take the atoms and arrange them into the right places, and you’d get sirloin that had never been part of a cow.
It would be a great thing for ethical vegetarians.
I think that this sort of ‘replicator’ will come along much sooner than an energy-matter converter.