One very rare cabinet size specimen of very thin and strong cast of chalcedony with very light green color, build as a thin skin on the top of the steep scalenohedron calcite crystals, lately completely dissolved. The chalcedony skin followed all sculptures of the calcite crystal faces even in the smallest details. The chalcedony aggregate is very stable and strong, despite their low thickness.
An exceptional specimen of very thin „skin“ of chalcedony developed on large calcite scalenohedron crystals, lately dissolved. Chalcedony aggregates copy all small details of former calcite crystals, including crystal faces sculptures.