1.4" Vivid Green, Atacamite Aggregation - Peru

This is an aggregation of vivid green atacamite. It was collected from the Lily Mine in Pisco Umay, Peru and is 1.4" wide.

Atacamite is a secondary copper mineral that's formed from the oxidation of copper minerals. It has the chemical formula Cu₂Cl(OH)₃ and forms as slender prismatic crystals, fibrous crystals and as granular to compact aggregations. Atacamite was first described by D. de Fallizen after specimens found in the Atacama Desert of Chile in 1801.