Williamite

Part of speech: noun

Definitions

1. A rare mineral primarily composed of zinc silicate that often occurs in white or light-colored masses
2. An unusual form of zinc silicate mineral, typically found in crystal or powdery aggregates with distinct linear patterns
3. A specific type of mineral characterized by a light hue and consisting mainly of zinc silicate, found in select geological environments

Etymology: Williamite is named after a person, though not the person you might guess. The mineral was identified in the early nineteenth century in the Belgian Congo and in other deposits, and it was named in honour of William I of the Netherlands, the king whose patronage supported mining and mineral research in the Low Countries at the time. The name follows the ordinary mineralogical pattern of a personal name plus the suffix "-ite", the standard ending for minerals and rocks. The same name also produced an older and unrelated sense. The "-ite" suffix here is simply the mineral-naming convention, so the word's form tells you nothing about the mineral's chemistry beyond its being a silicate of zinc. Readers who meet the word in older mineralogical texts should expect the spelling and naming conventions of that era.