Formula: (Ca,Na2)3(Si12Al6)O36.18H2O tectosilicate (framework silicate), zeolite group
Specific gravity: 2.09 to 2.16
Hardness: 4 to 4½
Streak: White
Colour: Colourless, white, grey, yellow, red

Basaltic cavities

Lévyne occurs most commonly in cavities in low silica volcanic rocks such as olivine basalt, and rarely in andesite, often associated with other zeolites, especially offretite and erionite.