The Probert Encyclopaedia of Rocks & Minerals

STILBITE

Stilbite is a secondary mineral formed by the action of hydrothermals on pre-existent minerals. It is found in cavities in basalts and related rocks in Scotland, Ireland and the Faroe Islands. It has a relative hardness of 4. Stilbite is a member of the zeolite group and was confirmed as a distinct species of mineral in 1797. Stilbite is a hydrated silicate of sodium, calcium and aluminium and is white to red in colour and exhibits a glassy or pearly lustre.
Research Stilbite