not sure if this is accurate, but Googling the price per ton of phosphorite: $170/ton, but the quote showed "phosphate". Anyway, about $16 billion dollars? Does that sound right? This should be good for at least a 10 cent move.
The 18.8% is on the higher range of 15-20%. I think I understand it. It is clearly a several billion dollar deposit and the trick is to determine how omex monetizes it to present value. The experts will weigh in soon enough.