Calcite after calcite pseudomorph coated by limonite on quartz

One very old cabinet size specimen of quartz, covered with steep scalenohedron calcite crystals, build in the alternation of several generations of calcite and quartz very thin ( less than a millimeter) layers. Later on, these scalenohedron crystals were coated by limonite. At the end of crystallization process appear white, flat rhombohedron calcite crystals.

Calcite ater calcite pseudomorph

A very attractive specimen of steep calcite scalenohedrons followed by thin quartz layers and covered with several portions of later generation of calcite. The crystals were broken by tectonic moves and later rehealed by transparent calcite.

Quartz pseudomorph after calcite

An excellent miniature specimen showing a „cast“ of quartz, covering steep scalenohedron crystals, secondary completely dissolved.