Old silver mine, the tailings of which prove rich pickings.
A little crystal vug, the cubes are galena (lead silver ore), some quartz, the tiny triangles with cut off edges are (I believe) sphalerites.
a seam of tiny, translucent quartz crystals
Lead ore under the microscope, blues, purples, other colors associated with copper.
Tiny cubes of galena under the microscope