I've heard this about a lot of materials that various industries have become dependent on cheaply from china, which china now pretty much have exclusivity on the production of.
I recall reading about some obscure mineral that pretty much all electronic circuits depend on on being mined in China, and if China wanted to they could totally screw over the world's electronics manufacturers. And that, apparently, is exactly what they are beginning to do.
Say what you want about the actions of nations like the US and UK and their ramifications internationally - you wait until China start REALLY flexing their muscles. The US might try spinning stuff to make themselves look like the good guy, but China simply do NOT give a sh*t. Look at Africa - Darfur for example. What's that? Our business partners going around commiting acts of genocide? World up in arms? So what?