Alchemist turn cement into metal.

[JGolds]

https://www.latinospost.com/articles/20138/20130528/modern-day-alchemists-turn-cement-metal.htm

What other possibilities, it thought this was a dead practice?

 

[Siro]

I'm sorry, but are you under the impression that this has something to do with alchemy? As in the middle ages mumbo jumbo about turning lead into gold? It doesn't. The headline is just going for style.

The article is short, so I can't be completely certain about the mechanisms, but it seems like material scientists found a way to trap electrons in ceramics into a conductive layer that surrounds the material's crystal structure, creating an ocean of free electrons similar to the one found in metals.