Locality: Sol Mine, Cerro de los Guardias, Rodalquilar, Níjar, Almería, Andalusia, Spain FOV: 1.5mn Copyright © Christiane & Jean-Robert Eytier

Chemical Formula: Cu19(SO4)(OH)32Cl4 · 3H2O
Name Origin: Named after the Scottish chemist, A. Conell (1794-1863).

Connellite is a rare mineral species, a hydrous copper chloro-sulfate, Cu19(OH)32(SO4)Cl4·3H2O, crystallizing in the hexagonal system. It occurs as tufts of very delicate acicular crystals of a fine blue color, and is associated with other copper minerals of secondary origin, such as cuprite and malachite. Its occurrence in Cornwall, England, was noted by Philip Rashleigh in 1802, and it was first examined chemically by Prof Arthur Connell FRSE in 1847, after whom it is named.

The type locality is Wheal Providence at Carbis Bay in Cornwall. Outside Cornwall it has been found in over 200 locations worldwide including Namaqualand in South Africa and at Bisbee, Arizona (USA).

Physical Properties of Connellite

Cleavage: None
Color: Blue green, Light blue.
Density: 3.4
Diaphaneity: Translucent
Fracture: Uneven – Flat surfaces (not cleavage) fractured in an uneven pattern.
Hardness: 3 – Calcite
Luminescence: Non-fluorescent.
Luster: Vitreous (Glassy)
Magnetism: Nonmagnetic
Streak: light blue green


Locality: Bleida Mine, Bleida, Bou Azer District (Bou Azzer District), Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco FOV: 2mm Copyright © Pierre Le Roch
Locality: Madonna di Fucinaia (Madonna della Fucinaia) slag heaps, Campiglia Marittima, Campigliese (Campiglia Mountains; Campiglia Ridge), Livorno Province, Tuscany, Italy FOV: 1.2mm Copyright © Tiberio Bardi
Locality: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany Picture width 3 mm. Copyright © Stephan Wolfsried

Locality: Hilarion Mine (Hilarion adit; Hilarion Mine No. 50), Hilarion area, Kamariza Mines (Kamareza Mines), Agios Konstantinos [St Constantine] (Kamariza), Lavrion District Mines, Lavrion District (Laurion; Laurium), Attikí Prefecture (Attica; Attika), Greece FOV; 15mm Copyright ©Fritz Schreiber