Goldhillite

IMA formula: Cu₅Zn(AsO₄)₂(OH)₆(H₂O)

Crystallography: Monoclinic. P2₁/c, a = 12.3573(5), b = 9.2325(3), c = 10.7163(4) Å, β = 97.346(4)°. Z = 4.

Specimen #249. Goldhillite (emerald-green), zálesíite (pale green needles) and cornwallite (botryoidal, dark-green). Gold Hill Mine, Gold Hill, Gold Hill Mining District (Clifton Mining District), Tooele County, Utah, USA. FOV 6.3 mm.