Kingly rare earth grades at Sheep Creek

Assay lab results affirm high-grade nature of critical minerals deposit in SW Montana.

If "grade is king," then US Critical Materials Corp.'s Sheep Creek in Montana wears the crown when it comes to rare earth projects in the United States.

The mining sector mantra "grade is king" alludes to the idea that a mine capable of producing one kilogram of rare earths for every 11 tons of ore dug up will b...