Rhodochrosite Specimen with Galena and Pyrite (Copyright 2012 Th' Gaussling)

Rhodochrosite is a mineral composed of MnCO3. The specimen above is in no way exceptional, other than as a curio. The mass is comprised of rhodochrosite, galena, pyrite, what looks like quartz, and possibly a trace of a gold colored metal.

The photo below shows the galena, or PbS.

Same sample as above, showing the galena. (Copyright 2012 Th' Gaussling)

The photos were taken with a USB microscope.