René Just Haüy, french mineralogist in 1797 named analcime after the greek analkimos (weak) word, due to the weak electrostatic properties of the mineral. Analcime belongs to the zeolite group and a relatively common mineral. Principally it can be found in the volcanic rocks in basalt and andesite. It usually issues in grainy, massive aggregations, but also in individual (typically 24 deltoid shaped faces) crystals. It can be found in Hungary in more places (Dunabogdány Csódi Hill, Szob, Zalahaláp, etc.). Its classic localities are the Cyclopean Islands east from Sicily, but can be located in more parts of Italy, a 25 cm large crystal has been found. Localities: Italy, Iceland, Russia, Canada, USA, Australia, etc.