Warren Buffet and Lithium, page-2

To add to the above:
Furthermore, there are only a few places in the world where lithium is present at high enough concentrations in these salty brines and the most famous is in the Atacama Desert, in the “Lithium Triangle” of Bolivia, Argentina and Chile. Supply here is threatened by corruption and politics, making it difficult to capitalize on burgeoning demand.
The more secure lithium resources are those locked up in hard rock as China seems to prefer having experienced difficulties with its brine deposits that contain high levels of magnesium.
Most of China's supply is from hard rock spodumene deposits. Western Australia now has the vast majority of lithium in hard rock Spodumene deposits Greenbushes ( Talison/Tianqi), Pilgangoora,( PLS) Mt Cattlin ( GMM /GXY ) and Mt Marion ( NMT )