It was first described in 1816 for an occurrence in the Cyclopean Islands near Catania, Sicily. From the Greek mesos, “middle”, as its composition lies between natrolite and scolecite.

Where is Mesolite found?

Mesolite has many localities but only a few have large crystal specimens or large masses. Some of the best localities for Mesolite are in Canada, the United States, France, Iceland, and India. It occurs in volcanic rock cavities, typically found in basalt but also in andesite, porphyrite, and hydrothermal veins.

Where is scolecite found?

Most of the world's finest scolecite specimens are found in the Tertiary Deccan Basalt near Nasik, Pune, in the state of Maharashtra, India.