Jasrouxite
Jasrouxite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Ag₁₆Pb₄(Sb₂₅As₁₅)Σ₄₀S₇₂.
It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Lillianite structural group.
Key properties: specific gravity 4.87; Gray. Bireflectance: Weak, white to whitish creamy streak; Metallic luster.
IMA symbol Jrx, IMA status: approved, named in 2012.
An early hydrothermal (epithermal) mineral along veins in silicified meta-sedimentary rocks.
It is found associated with Coated by a myrmekitic aggregate of stibnite, baumhauerite-boscardinite, and smithite and associated with realgar, pyrite, sphalerite, and other lead sulfosalts.
The name refers to the locality from which the first specimens were obtained.