Formula: Cu36(SO4)(OH)62Cl8.6H2O
Hydrated sulphate containing hydroxyl and halogen, connellite-buttgenbachite series, copper mineral
Specific gravity: 3.36
Hardness: 3
Streak: Pale greenish blue
Colour: Azure blue
Solubility: Insoluble in water, soluble in acids and in NH4OH. Easily fusible.


Hydrothermal environments

Connellite is an uncommon secondary mineral in the oxidized portions of copper deposits, associated with cuprite, spangolite, atacamite, botallackite, langite, malachite and azurite (HOM).

At the Roughton Gill Mines, Cumbria, England, UK, connellite is often found where copper veins oxidise in saline environments, and is also sometimes found in the supergene oxidation zones of base metal orebodies; in these assemblages it is commonly associated with cuprite (JRS11.3.12).

At the New Cliffe Hill quarry, Stanon under Barton, Leicestershire, England, UK, connellite has been found with brochantite and malachite (RES p196).

At the Gallagher mine dumps, Cochise County, Arizona, USA, connellite is associated with anglesite, botallackite, bromian chlorargyrite, cerussite and chrysocolla (R&M90.4.342).

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