[baybal2]

Energy is scarce though. Only Chinese smelters have dolomite based production, which is much cheaper than bruteforce electrolysis.

[bell-cot]

I sense something else going on here. The mineral dolomite is hardly scarce, and the Pigeon Process (to produce magnesium from dolomite) was invented in Canada in the 1940's.

[baybal2]

High quality magnesite, magnesia, and dolomites are scarce, but central China is one big slab of them.