Lets say that one of those polymetalic zones is averaging 1%...

Lets say that one of those polymetalic zones is averaging 1% cobalt. It's about 100m deep and 200m x 200m wide. They have a specific gravity of 2x . . so each metre at average 1% is about 2 tonne so there is about 8m tonnes there. So about 80k tonnes of cobalt. So about $5b in cobalt. Those numbers are wildly "rough maths" so even if you make it 10% of that for fudge factor, you are still looking at 500m for a big block of open cut. . . . you can see how this is mega valuable at this rate.