I was planning a hike to an old mine site where interesting minerals had been found. Directions were vague so I researched further. Getting to the mine involves at least a four mile hike with an elevation drop of ~1300 feet (it's a down and up, not my favorite). So I finally track down accurate info on the mine. Yeah, about that hike… "the mine was accessed via an aerial tramway descending the 360 foot cliff face." Okay, fine, minerals are minerals, I'll figure it out when I get there. Then, "the filled fracture averages about 3mm in thickness." The good minerals are microscopic. That would have blown chucks to have made the journey only to find pretty dust.