Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of troostite is as below...

Troostite :: Troostite (n.) Willemite.

Willemite :: Willemite (n.) A silicate of zinc, usually occurring massive and of a greenish yellow color, also in reddish crystals (troostite) containing manganese..

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