Compare apples to apples & oranges to oranges. When you mine Antimony metros you come out with thousands of pounds of product. Unlike gold where you mine thousands of pounds of sand & come out with ounces of gold. The fact that it is becoming(antimony) to find should bump the price up. I see its new price per pound being established soon. Its sale will probably come by way of auction. I'm just speculating.
The highly trained geologist that did the NI 43-101 report seems to think its feasible, of course having already read it you knew that didn't you?......lol