Perusers of REM articles should have on hand the following chart (rare earths in blue, commercially impt elements in red).
https://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth...
And the ones mentioned in the article are more abundant than silver. This is not to say that they will be easier to extract than silver, but it does give a perspective.
Perusers of REM articles should have on hand the following chart (rare earths in blue, commercially impt elements in red).
https://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth...
And the ones mentioned in the article are more abundant than silver. This is not to say that they will be easier to extract than silver, but it does give a perspective.