Category:Laumontite

Lau"mont*ite, n. Etym: [From Dr. Laumont, the discoverer.] (Min.)

Defn: 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.]