👉 Gastalite, also known as granuliferous ferruginous matter or ferruginous ferric oxide, is a mineral that occurs in the rocks of the South American Andes and is used for its unique properties. It is primarily composed of ferric oxide (Fe2O3) and ferric hydroxide (Fe(OH)3). The term "gastalite" can also refer to the process by which it forms, as it is a mineral that is
