sap·o·nite (s p  -n t )n. A clay mineral that is a hydrous silicate of aluminum and magnesium and occurs in soft amorphous masses in the cavities of certain rocks. |
p
, ssaponite [ˈsæpəˌnaɪt]
n
(Earth Sciences / Minerals) a clay mineral consisting of hydrated magnesium aluminium silicate and occurring in metamorphic rocks such as serpentine
[from Swedish saponit (a rendering of German Seifenstein soapstone), from Latin sāpō soap]
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