No idea what an ipod uses a neo for.
G-
The speaker, maybe?
Some people see this as a single-element issue. Actually it's broader than that. Tantalum, samarium, neodymium, radium, barium, heck even uranium, ALL the stuff on the bottom half of the periodic table have their uses, but are unhealthy for humans. Much of it is very valuable, such commodities are mostly indistinguishable from many sources, and the quantities to transport are generally small enough that it is very easy to trade worldwide. The situation makes it very easy for worldwide competition to go to the lowest bidder. If China shuts down trade of Neo, or several such minerals, other sources will pop up to fill the gap, a new (still cheap) price will be settled quickly, and likely by one or two of the next-lowest-bidders. With many countries possessing deposits of such minerals (Australia, Canada, US, Russia, Congo, South Africa, etc.) the inequalities of the world will determine who the next low-cost source will be.
It takes a very big crisis, or a thoroughly planned strategic decision for any country to refuse lowest-cost mineral supplies for their industries. I do not envy the politicians who contemplate putting their heads on the chopping block in this way, no matter how moral it would be to do so. They are, of course, less vulnerable in a communist country like China. If the issue were to enter mass public consciousness in democratic countries (yeah, right) then suddenly there might be political will to prefer sources of materials that don't kill thousands of people per year, or pollute the drinking water of millions.
But we have economists to prevent us from deluding ourselves...