Gold's average consolidation in the Earth's crust is 0.005 parts per million. The technology of eradication is expensive primarily because the process always requires gold mining companies to shape large physical quantities of ore for small results. The energy required to have, chore and process ore is itself benificial, as are the chemicals used in the process, and this places a lower limit on the quality of ore which can be profitably worked in the gold mining process.
