Aurichalcite

IMA formula: (Zn,Cu)₅(CO₃)₂(OH)₆

Crystallography: Monoclinic. P2₁/m. a = 13.82(2) Å, b = 6.419(3) Å, c = 5.29(3) Å, β = 101.04(2) Å. Z = 2.

Specimen #235. Aurichalcite (pale blue-green), hemimorphite (colorless) and smithsonite (green, not shown in this photo). 79 Mine, Chilito, Hayden area, Banner Mining District, Gila County, Arizona, USA. FOV 7.2 mm.