Zeolites are alumino-silicate minerals where usually water molecules are built into the crystal cructure. Zeolites are commonly forming as secondary minerals in volcanic rocks.
Zeolites (Greek, zein, "to boil"; lithos, "a stone") are hydrated aluminosilicate minerals and have a micro-porous structure.
The term was originally coined in the 18th century by a Swedish mineralogist named Axel Fredrik Cronstedt who observed, upon rapidly heating a natural mineral, that the stones began to dance about as the water evaporated. Using the Greek words which mean "stone that boil... Read all
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Tours to erupting volcanoes From time to time, we organize special tours to see volcanoes in eruption. These are often announced only few days or weeks in advance. Find out more!
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