underthescopemineral:

Connellite

Cu₁₉(SO₄)(OH)₃₂Cl₄·3H₂O

Locality:

Madonna di Fucinaia (Madonna della Fucinaia) slag heaps, Campiglia Marittima, Campigliese (Campiglia Mountains; Campiglia Ridge), Livorno Province, Tuscany, Italy

Largest Crystal Size: 2.75 mm

Connellite ball inside a cavity. 

Collection & Photo Matteo Chinellato

Connellite is a rare mineral species, a hydrous copper chloro-sulfate.  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.