Ophirite
A rare calcium-iron tungstate discovered in a single veinlet at Utah's Ophir Hill Consolidated mine.
Intro adapted from Wikipedia (CC BY-SA).
Ophirite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Ca₂Mg₄[Zn₂Mn³⁺₂(H₂O)₂(Fe³⁺W₉O₃₄)₂]·46H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 2; specific gravity 4.06; Pale orange streak; Vitreous luster; optically biaxial.
IMA symbol Oph, IMA status: approved, named in 2013.
Produced by late acidic and oxidizing hydrothermal solutions reacting with dolomite and scheelite, in the presence of pyrite and calcium-rich hornfels.
It is found associated with Scheelite, pyrite, dolomite, sericite, apatite, bournonite, galena, sphalerite, fluorite, sulfur.
The name refers to the mine that yielded the first specimens.