Metallic silvery crystals of the extremely rare sulfoselenide mineral proudite from one of the very few localities known worldwide (Janos Municipality, Chihuahua, Mexico). Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Proudite
Proudite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Cu₂Pb₁₆Bi₂₀(S,Se)₄₇.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: specific gravity 7.08.
IMA symbol Pdi, IMA status: approved, named in 1975.
With large, presumably hydrothermal magnetite bodies (Juno mine, Australia).
It is found associated with Gold, junoite, selenian heyrovskýite, krupkaite, magnetite (Juno mine, Australia).
The mineral was named to honor John S. Proud (1907–1997), a Director of the Peko-Wallsend mining company, developers of the Tennant Creek deposits.