quetenite

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• quetenite — noun botryogen …   Wiktionary

• Botryogen — is a hydrous magnesium sulfate mineral with formula: MgFe3+(SO4)2(OH)·7H2O. It is also known as quetenite . It crystallizes in the monoclinic prismatic system and typically occurs as vitreous bright yellow to red botryoidal to reniform masses and …   Wikipedia