A nice chunk of Wherryite crystals, sadly the whole vug was full of them until I blew about half of it away with compressed air, trying to remove that annoying fiber :( The fiber won this one, and remains in the picture... FOV ~ 2mm Stacked with Helicon Focus Software (18 images) (Depth Map, R=20, S=2). Obtained from Les & Paula Presmyk in Prescott, AZ, 2015. Ben Kirchner specimen and photograph. From Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth District, Pinal Co., Arizona, USA — Photo: Ben Kirchner · CC BY 3.0
Wherryite
Wherryite is an IMA-recognized mineral species in the silicate class, with the chemical formula Pb₇Cu₂(SO₄)₄(SiO₄)₂(OH)₂.
It crystallizes in the monoclinic crystal system (space group C2/m).
IMA symbol Whr, grandfathered status — known before the IMA’s founding, named in 1950.