A mineral compound containing manganese and iron oxides, named after its discoverer or source location.
From English glad (possibly a place name like Glad, Germany) plus the mineral suffix -ite, which is used to name minerals and rocks throughout geology. The exact etymology depends on the mineral's discovery history.
Geologists have a fun naming system for minerals—they often name them after the place where they're found or the person who discovered them, with -ite tacked on the end. There are thousands of these mineral names, and gladite is just one of many stories locked in the Earth!
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