Axel Cronstedt, a  Swedish scientist described in 1756 first  two mineral samples  from Iceland and  Svappavara,  Sweden, which boiled, if heated with a blowpipe. He named it Zeolithes from  Greek  ζέω  = boiling  und λίδος = stone. At Cronstedt´s time Zeolites or Zeolithe (in German) have been only a natural curiosity. But over the time more of the features of Zeolites have been investigated. Today a large number of natural and synthetic Zeolites are known and both types are used in many ways  and play an important role in our daily life.

 Scolecite from Breiđdalsvik, Ìsland (6x8 cm)

A Stilbite crystal from Berufjørđur, Ìsland  boiling under the blowpipe