pinnoite
noun
pin·no·ite
\ˈpinəˌwīt\
Definition of pinnoite
-s
: a hydrous magnesium borate Mg(BO2)2.3H2O usually occurring in yellow nodular masses with a radiating fibrous structure (hardness 3–4, specific gravity 2.3)
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Origin and Etymology of pinnoite
German pinnoit, from Pinno, 19th century German mining official + German -it -ite
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