Some of the finest Covellite, in thin platy crystal stacks, came from the Calabona Mine, Alghero, Sardinia, Italy. Colorful foliated
crystals have come from the Bor District, Serbia. In the U.S., the locality of Butte, Silver Bow Co., Montana, is perhaps the best-known locality for this mineral. Covellite clusters over three feet in length have been recovered at the Leonard mine in Butte. Aesthetic masses and think platy crystals of Covellite have come from the Summitville District, Rio Grande Co., Colorado.