What is Valentinite?
[[File:Valentinite-205948.jpg|thumb|Valentinite]] '''Valentinite''' is a [[mineral]]. Its chemical formula is Sb<sub>2</sub>O<sub>3</sub>. It is a mineral form of [[antimony trioxide]]. It has a [[Mohs hardness]] of 2.5 to 3. It is colorless to white. Its [[specific gravity]] is 5.76. It is made when [[stibnite]] is [[oxidation|oxidized]]. {{science-stub}} [[Category:Minerals]]