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Webster 1913 Edition

Laumontite

Lau′mont-ite

,
Noun.
[From Dr.
Laumont
, the discoverer.]
(Min.)
A mineral, of a white color and vitreous luster. It is a hydrous silicate of alumina and lime. Exposed to the air, it loses water, becomes opaque, and crumbles.
[Written also
laumonite
.]

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