Home > Copper Minerals I – May 5 > MS1060 Chalcoalumite, Cyanotrichite

Chalcoalumite, Cyanotrichite - Sold

Chalcoalumite and cyanotrichite are both hydrous sulfates of copper and aluminum. Chalcoalumite originally occurred at Bisbee, receiving its name for its chemistry (Larsen & Vassar, 1925). Cyanotrichite takes its name from the Greek roots for blue and fiber, in allusion to the appearance of the species (Glocker, 1839). The bulk of this specimen appears to be chalky chalcoalumite, on which botryoidal sea foam blue chalcoalumite occurs on one surface. On the botryoidal chalcoalumite, there are later darker blue fibers of cyanotrichite and some very late gypsum. An attractive specimen from a closed locality!