Aurichalcite

Usually found as a secondary mineral in copper and zinc deposits. It get's it's blue-green color from it's copper contents.

Locality

Colorado

Streak

Light Blue

Hardness

Formula

1-2

(Zn,Cu)5(CO3)2(OH)6

Habit

Typically in tufted divergent sprays or spherical aggregates, may be in thick crusts; rarely columnar, laminated or granular