Chrysocolla comes in many different shades of blue and green and will often have reds and browns mixed in as well.
It is a copper mineral so is a cousin to turquoise and is much harder and brittle than most turquoise. It is found an more places than turquoise is found.
Some of the very best comes from Morenci and Bisbee Arizona, but it is literally found over most of Arizona and Nevada as well as Mexico and other places which have copper production.
Some of the most beautiful specimens in my opinion are from Arizona and Mexico, including Parrot Wing Chrysocolla,Gem Silica and what most of us just call Chrysocolla. It is normally a little less expensive than turquoise, but high quality pieces are easily worth as much as some of the finest turquoise.