Atacamite - Cu₂Cl(OH)₃

Habit: As slender, prismatic or tabular bright green, dark emerald-green, to dark green crystals. Transparent to translucent, Adamantine to vitreous Luster.

Environment: An oxidation product of other copper minerals, especially in arid or saline conditions.

Etymology: For the Atacama Desert, Chile.

An alteration product of bronze and copper objects. One of the corrosion products on the Statue of Liberty in the USA.