The light green, mostly transparent prehnite beads have a diameter of 2mm, in total the gemstone strand has a length of 40cm.
Green Prehnite is important in gemstone medicine to strengthen the acceptance of one's own weaknesses as well as those of fellow human beings. Unpleasant truths can be accepted more easily with the support of the mineral.
The mineral Prehnite received its name after Colonel Hendrik von Prehn (1733 - 1785); spellings like Phrenite, Prenhite, Prenith or Phrenite are therefore not correct. Von Prehn brought back samples from the Cape of Good Hope in 1783 and had them examined by the mineralogist Abraham Gottlob Werner. The latter described the material and named it after von Prehn then Prehnite. The stone is the first mineral that is named after a person.
Trade names for the Prehnt are cape chrysolite and cape emerald, earlier common names are aedelite, chiltonite, coupholite and edelite.