Brochantite and Cyanotrichite

A colorful combination piece with nearly concentric rings of blue cyanotrichite surrounding a central mass of brochantite. The blue sprays combined with the green sprays, under a loupe are a wonder to behold. Collected in 1975. Ex Ken Roberts collection.

Locality: Grandview Mine, Grand Canyon, Coconino County, Arizona

Composition: copper sulfate