Properties :
Okenite remains a rare stone in the practice of lithotherapy, due to its fragility since the slightest contact can greatly weaken the fibers of the stone. Therefore, it must nev...
Presentation :
Names) :
Prehnite.
Etymology:
Named after the Dutch colonel H. von Prehn (1.733-1785) who discovered the mineral. (Werner, 1790).
Color :
Colorless, Wh...
