Click on "thumbnail" images for a full sized picture,

This is what it was all about---Lead and Zinc.
Pictures 1 and 2 are lead, while 3, 4, and 5 are Zinc.
Picture 6 shows Zinc encased in "Tiff", a low grade quartzite.
These aren't the best samples, but they are the best I own.
Rocks like these were common in the '50s when I was a kid.