a clay mineral, hydrous magnesium aluminum silicate, belonging to the montmorillonite group: found as a soft filling in rock cavities.
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How to use saponite in a sentence
It is built of blue-grey saponite, a local stone easy to work, varied with marble from the island of Almenningen.Capitals of the Northlands | Ian C. Hannah
British Dictionary definitions for saponite
a clay mineral consisting of hydrated magnesium aluminium silicate and occurring in metamorphic rocks such as serpentine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012