This azurite is from the Milpillas Mine in Cuitaca, Mun de Santa Cruz, Sonora, Mexico.These azurite crystals are from the Milpillas Mine in Cuitaca, Mun.de Santa Cruz, Sonora, Mexico. Mining at this locale began in 2006 with the extraction of copper minerals. Thirty-six mineral species have been identified at the mine including world class azurites. It is a secondary copper carbonate containing the elements Cu, C and O. Mining started in several copper oxide zones where the carbonate minerals including azurite were found.This specimen consists of a breccia tuff matrix that hosts and is intertwined with several crystals. The primary crystal has a complex termination and measures approximately 18 mm tall. The secondary crystals average about 8 mm. The crystals have a Prussian blue color with flashes of cobalt blue under bright light. Their luster is vitreous. This piece measures 1 3/16 x 15/16 x 5/8 inches or 30 x 24 x 16 mm.