Gold averages 0.004 ppm (parts per million) in the crust of the earth. Knowing this tells you that gold is indeed, a very rare, precious metal. It takes about 31.1 ppm to = 1 opt (ounce per ton) Today an ounce of gold is worth around $1200. Do you have hopes of nuggets lying around in plain sight? If so, give up now! I have spent much of my life wandering the mountains and deserts of our Great American West, by helicopter, horse, pick-up truck, four-wheeler and mostly, on foo