Natrochalcite

Formula: NaCu2(SO4)2(OH) · 2H2O

Name: In allusion to the composition, containing sodium (Latin = NATRium) and copper (CHALCo-)

Type Locality: Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta, Chile

Color: Bright green; green in transmitted light.

Lustre: Vitreous

Hardness:

Density: 3.47 – 3.51

Crystal System: Monoclinic

Member of: Tsumcorite Group