Dust-Ball Floriculture?

These interesting images were taken while scanning a common piece of galena with a scanning electron microscope.
The flower is apparently a piece of dust! (The image has NOT been digitally altered.)

Galena Rose at 50X taken by Jeff Thomas, November 1997, with a JEOL SEM
Galena Rose at 150X taken by Jeff Thomas, November 1997, with a JEOL SEM
Galena Rose Bud at 1000X distortion due to electron charging, since specimen was uncoated taken by Jeff Thomas, November 1997, with a JEOL SEM
Galena Rose Stem at 750X distortion due to electron charging, since specimen was uncoated taken by Jeff Thomas, November 1997, with a JEOL SEM