Shattuckite

inosilicate

chrysocolla

Formula: Cu5(SiO3)4(OH)2 inosilicate (chain silicate)
Specific gravity: 4.11
Hardness: 3½
Streak: Pale blue
Colour: Light to dark blue
Environments

Metamorphic environments
Hydrothermal environments

Shattuckite is a rare secondary mineral that is formed in arid conditions by the oxidation of copper deposits, commonly associated with chrysocolla, ajoite, malachite, quartz, and hematite. It also develops in the zone of alteration in massive and disseminated hydrothermal replacement deposits.

Localities

Democratic Republic of the Congo

Mashamba West mine, Kolwezi District, Katanga, Congo: Unusual pseudomorphs of shattuckite after cuprite have been found.

Sanda mine at Mindouli, Poole Department, Congo: Shattuckite occurs with dioptase.

Mexico

Munihuaza near Alamos, Sonora, Mexico: Shattuckite occurs in massive fibrous pods locally containing native gold.

Namibia

Omaue mine, Kanini Region, Namibia: Shattuckite is occasionally associated dioptase and malachite. Cavities are lined with quartz crystals thickly included with shattuckite. The oxide zone paragenesis here includes at least two generations of dioptase, the first associated with chalcocite, followed by chrysocolla, plancheite, shattuckite and, finally, late-stage dioptase. namibite and mottramite variety duhamelite, occur with shattuckite and apachite occurs with late generation chrysocolla, as a partial oxidation of shattuckite. The apachite is associated with brochantite in sandstone, and with malachite in limestone.

Farm Mesopotamia 504, Khorixas District, Kunene region,Namibia: Shattuckite occurs associated with plancheite.

Tsumeb, Oshikoto Region, Namibia: Shattuckite occurs in the second oxidation zone associated with plancheite, malachite, and chrysocolla variety bisbeeite.

South Africa

Messina mine, Mpulmalanga Province, South Africa: Shattuckite occurs as blue inclusions in quartz crystals.

USA

Shattuck mine, Bisbee, Warren District, Cochise County, Arizona, USA: This is the type locality. Shattuckite occurs here as pseudomorphs after malachite and associated with chrysocolla, variety bisbeeite, which replaces it.

New Cornelia mine, Ajo District, Pima county, Arizona, USA: Voids host acicular tuffs of shattuckite some partially altered to chrysocolla, variety bisbeeite. It is associated with quartz, calcite, conichalcite, olivenite, ajoite, chrysocolla, and plancheite. ajoite is intergrown with shattuckite as are quartz and hematite.

Artillery Peak, Mohave County, Arizona, USA: Shattuckite occurs in oxidised ores with alamosite and luddenite.

Moon Anchor mine and the Potter-Cramer property, south of Wickenburg, Maricopa County, Arizona, USA: Shattuckite has been found in the oxide zone assemblage, together with wickenburgite and phoenicochroite.

The Betty Jo claim, 8 miles southeast of Ely, White Pine County, Nevada, USA. Shattuckite occurs with mimetite, pyromorphite and chrysocolla.

Common impurities: Fe,Mn,Mg,Ca,H2O

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