The “cesium standard” is also key to time:
Canada is only hope for North American production right now, & Power Metals is sitting on prime pegmatites discovered in Aug 2018 at its West Joe Dyke play, where it intersected high-grade cesium mineralization in 6 drill holes while it was looking for lithium.
China has a virtual monopoly over cesium, producing no less than 95% of
"One earthquake and all of a sudden, you close down a whole industry," Dr. Sherman Robinson, senior fellow with the Peterson Institute for International Economics, told ZDNet.
"They were buying these supplies from all over," Anderson told ZDNet, "but they weren't aware that it was all coming from one place in the end."
That means that China’s control of cesium is