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Formula: Na6(Si12Al6)O36.18H2O
Tectosilicate (framework silicate), zeolite
Crystal System: Trigonal
Specific gravity: 2.09 to 2.16
Hardness: 4 to 4½
Streak: White
Colour: White, greyish white, reddish white, yellowish white, Grey
Environments:
Lévyne-(Na) mostly comes from the seashore, where cation exchange with seawater probably occurred
(Dana)
The type locality is Chojabaru, Iki Islands, Iki City, Nagasaki Prefecture, Japan.
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