Quartz with calcite „hat“

An excellent thumbnail of transparent clear quartz covered by calcite aggregate of small calcite crystals and in the end of crystallization process with one rhombohedron crystal developed on pyramidal face of the larger quartz crystal.

Green transparent sphalerite on quartz

A very nice cabinet size specimen of several isolated, well shaped crystal groups of green sphalerite crystals on matrix of space developed quartz net.

Rhodochrosite on quartz

One extraordinary nice miniature specimen, presenting the best rhodochrosite spherolites covered with flat rhombohedrons, developed perpendicularly to the base, on the top of thin transparent quartz crystals.