Goethite

Part of speech: noun

Pronunciation: /ˈɡœtaɪt/

Definitions

1. A naturally occurring mineral consisting mainly of iron that often appears as a yellowish-brown substance in sedimentary deposits
2. A specific type of iron oxide mineral recognized for its occurrence in oxidized environments and yellowish-brown coloration
3. A yellowish-brown mineral primarily composed of iron that is typically found in oxidized sedimentary formations

Etymology: The mineral is named after a poet, though Johann Wolfgang von Goethe was not a geologist by training and the link is more curious than it first appears. Goethe was a German polymath who wrote on colour, plants and rocks, and he took a keen interest in mineralogy. The name "goethite" was given to the mineral in his honour, and the German form "Goethit" came first before the English word was formed from it. The ending "-ite" is the standard mineralogical suffix, used for minerals and, in general, for rocks and fossils, so the word is a plain compound of a personal name and that suffix. Goethite is one of the commonest iron minerals on Earth and is the main ingredient in many yellow and brown ochres, which is why it appears as a yellowish-brown substance in sedimentary deposits.

Synonyms: iron oxide, mineral, ore, hematite, limonite