Although Chalcopyrite is a common mineral, these pieces are considered Uncommon Chalcopyrite specimen with beautiful rainbow.  It is a copper iron sulfide mineral and the most abundant copper ore mineral. 
 
Chalcopyrite Healing Properties:
Activates and aligns all chakras
Shamans and reiki healers have used Chalcopyrite to remove blockages and helps one to transform energies that assist in changing of habits, routines, and lifestyles 
If you're feeling "stuck", Chalcopyrite is a stone associated with opportunity and new beginnings and can help with change