ATACAMITE

Etymology

Noun

atacamite (countable and uncountable, plural atacamites)

(mineral) A green copper(II) chloride hydroxide mineral, polymorphous with botallackite.

Source: Wiktionary

A*tac"a*mite, n. Etym: [From the desert of Atacama, where found.] (Min.)

Definition: An oxychloride of copper, usually in emerald-green prismatic crystals.

Source: Webster’s Unabridged Dictionary 1913 Edition