Sentence Examples with the word gothite

The metallic glitter of avanturine or sun-stone (q.v.) is due to the enclosed scales of gothite and certain other minerals.

Ferric oxide or iron sesquioxide, Fe203, constitutes the valuable ores red haematite and specular iron; the minerals brown haematite or limonite, and gothite and also iron rust are hydrated forms. It is obtained as a steel-grey crystalline powder by igniting the oxide or any ferric salt containing a volatile acid.