Azurite, Antlerite, Aurichalcite
Gunsight Pass, Helvetia, Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona, USA
Cabinet, 11.4 x 9.6 x 5.4 cm
Not the most beautiful specimen, but a really interesting combo specimen from a lesser-known locality with 3 different copper minerals present: azurite, antlerite (Copper Sulfate Hydroxide), which is the green mineral, and aurichalcite, the blue-green mineral towards the bottom. They have been deposited (grown, in the case of the azurite micro-crystals) in recesses in an iron-rich, limonitic matrix.