The Tongrube Plieskendorf is appropriate directly south for the city Calau, of which Plieskendorf is a local part. One reaches the pit, if one drives from Calau into southern direction to Werchow. The approach road to the pit is out-described. The gravel-pit is operating on miozenic „bottle clay “and the gravel of a young-tertiary Senftenberger River Elbe flowing relict. This gravel contain… agates.
Further data to the place of discovery is given at R.Haake, “agates collect in Germany, part 1” page 69 (Bode publishing house, 2000)