Beautiful Blue Arhbarite Crystals From Chile

Arhbarite
 
Formula: Cu₂Mg(AsO₄)(OH)₃
Colour: Dark blue to medium blue
Lustre: Sub-Vitreous, Waxy
Crystal System: Triclinic

From: El Guanaco Mine, Guanaco (Huanaco), Santa Catalina, Antofagasta Province, Antofagasta Region, Chile. 


Photo: Christian Rewitzer