This azurite crystal 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 large spearhead shaped complex crystal with minor matrix on the rear surface. This piece measures 1 3/16 x 1 1/8 x 9/16 inches or 30 x 28 x 14 mm.