The structure contains large open channels that allow water and large ions to travel into and out of the crystal structure. The size of these channels controls the size of the molecules or ions, and therefore a zeolite like analcime can act as a chemical sieve. Color is clear, white or gray, with greenish, yellowish and reddish tints possible. Luster is vitreous. Also granular and massive.
Cleavage is absent.
Fracture is uneven. Hardness is 5 - 5.5. Streak is white. Associated Minerals are quartz , calcite , serandite , apophyllite , natrolite , stilbite , heulandite and other zeolites . Best Field Indicators are crystal habit, density, low hardness, luster and associations.