WR1 General Discussion, page-33144

West Joe returns -22.22% CS2O very encouraging to say the least
-1.46% Li2O is pretty bloody good too
https://unauthorised investment adv...itical-mineral-restricted-by-chinas-hegemony/

~8% is considered very economical



Primary play caesium mining operations are rare because of the scarcity of sizeable pollucite deposits, – the only mineral known to contain high grades (~8% is considered very economical) of Cs and found in very highly fractionated lithium-caesium-tantalum (LCT) pegmatites.
Although it has a large number of isotopes, naturally occurring caesium in pollucite consists exclusively of nonradioactive isotope 133 caesium.
Both types are used in oil and gas drilling for lubrication and refining, medical isotopes and atomic clocks for 5G communication devices, among others, and are largely processed in China and Albemarle’s chemical factory in Germany