Stilbite
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Stilbite is the name of a series of tectosilicate minerals of the zeolite group. Prior to 1997, stilbite was recognized as a mineral species, but a reclassification in 1997 by the International ... Wikipedia
Category: Tectosilicate, Zeolite
Cleavage: Perfect on
Color: Usually colorless, white or pink
Crystal class: Prismatic (2/m); (same H-M symbol)
Crystal habit: Thin tabular, aggregates sheaf-like or in bow-ties, also fibrous and globular
Crystal system: Monoclinic, also triclinic and orthorhombic
Formula mass: Stilbite-Ca: 2,840 g/mol; Stilbite-Na: 2,864 g/mol