tectosilicate (framework silicate) zeolite group
Specific gravity: 2.26
Colour: Colourless, white, gray, yellowish
Common impurities: K
Mesolite commonly occurs in cavities in volcanic rocks, typically basalt,
also in andesite, porphyry (rock with coarse phenocrysts in a finer
groundmass) and hydrothermal veins. In basaltic cavities it is generally in association with other
In the vicinity of Meshkinshahr, Ardabil Province, Iran, mesolite is the most common zeolite, almost always associated with thomsonite and analcime.
In basaltic cavities in Oregon, USA, mesolite is associated with calcite, chabazite, analcime and stilbite (DHZ 4 p375).
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