SAPONITE
- a mineral found in rock cavities [n -S]
- a mineral found in veins and cavities of rocks [n SAPONITES]
- a hydrous magnesium aluminum silicate occurring in soft soapy amorphous masses and filling veins and cavities (as in serpentine)
- clay mineral, hydrous magnesium aluminum silicate, belonging to the montmorillonite group: found as a soft filling in rock cavities