Omariniite
Omariniite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Cu₈Fe₂ZnGe₂S₁₂.
It crystallizes in the orthorhombic crystal system (space group I222). It is a member of the Stannoidite structural group.
Key properties: Mohs hardness 3.5; specific gravity 4.319; Reddish brown streak; Metallic luster.
IMA symbol Oma, IMA status: approved, named in 2016.
Found in low-temperature, polymetallic, hydrothermal vein mineralization in association with a diatreme.
It is found associated with Putzite, catamarcaite, zincobriartite, bornite, chalcocite, digenite, covellite, sphalerite, tennantite, luzonite, wittichenite, thalcusite, mawsonite.
The mineral was named to honor Dr. Ricardo Héctor Omarini (1946-2015), Professor, University of Salta, for his numerous contributions to the geology of Argentina.