is a secondary mineral that forms in the oxidation zones of zinc
and copper deposits.
Crystals are typically acicular or fibrous and found in tufted aggregates but
may also form as thick crusts; rarely columnar,
laminated or granular. Aurichalcite's color is an attractive grass green to pale green.
It is often associated with such colorful minerals as Azurite, Malachite,
Aurichalcite can be confused with Rosasite.
However, Rosasite is usually more massive but not lamellar and its Mohs hardness
is 4.0 versus Aurichalcite's 1.0 - 2.0.
Widespread in small amounts. Localities noteworthy for
good specimens include: from the Loktevskii mine, upper
Loktevka River, west Altai Mountains, Russia. At Monteponi,
and in the Rosas mine, Sulcis, Sardinia, Italy. From
Laurium, Greece. At Chessy, near Lyon, Rhône, France.
In the USA, in Arizona, fine examples from Bisbee, Cochise
County, in the Silver Hill mine, Pima County, and at
the 79 mine, Gila County; from Cerro Gordo, Inyo County,
California; at the Kelly and Graphic mines, Magdalena,
Socorro County, New Mexico. In Utah, from the Tintic
district, Juab County, at the Hidden Treasure mine,
Tooele County, in the Apex mine, near St. George, Washington
County, and from Big Cottonwood Canyon, Salt Lake County;
at Leadville, Lake County, Colorado. In Mexico, rich
specimens from the Ojuela mine, Mapimí, Durango, Mexico.
At the Tchah Khuni mine, Anarak district, Iran. From
Tsumeb, Namibia. At Kipushi, 28 km southwest of Lubumbashi,
Katanga Province, Congo (Shaba Province, Zaire).