Huenite
Huenite is an IMA-recognized mineral species in the molybdate class, with the chemical formula Cu₄(MoO₄)₃(OH)₂.
It crystallizes in the hexagonal crystal system (space group P31c).
Key properties: Mohs hardness 3.5–4; specific gravity 5.1; Pale reddish brown to pinkish streak; Strong vitreous to adamantine luster.
IMA symbol Hue, IMA status: approved, named in 2016.
An oxidation product of primary sulfides formed by late-stage hydrothermal fluids as open-space fillings in pipes of tourmalinized quartz porphyry, collapse-breccia.
It is found associated with Lindgrenite, gypsum, tourmaline.
The mineral was named to honor Edgar Huen (b. 1947), an Italian senior mineral collector, and expert in Alpine fissure minerals and worldwide systematic mineralogy.