Scolecite is a member of the Zeolite group, and is closely related to Natrolite and Mesolite. All three are known for their needle-like crystal habits. While Mesolite’s fibrous cyrstals are typically the thinnest of the three, and Natrolite’s are a bit more sizable, Scolecite’s crystals tend to be the most substantial and durable. Its color is white and colorless with a vitreous to silky luster. This striking mineral is associated with other contrasting minerals, including Stilbite, Apophyllite, Calcite, Chalcedony and other Zeolite minerals.

The crystal system for Scolecite is monoclinic, typically in acicular and radial groupings, with individual slender crystals easily visible and distinguishable, often forming in cavities and vugs (this particular form is very aesthetic and provides natural protection for the mineral crystals). Other forms include tall columnar bundles of prismatic crystals and reticulated.

Quality Scolecite specimens are found in limited localities, including Brazil, Iceland, India, Italy, Switzerland and the USA (Washington).