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Blue crystalline crust with conichalcite
Chemical formulaCaCuAlSi2O6(OH)3
ColorDark blue crystals, light brue when massive
Crystal habitMassive; cryptocrystalline, forming flat elongated crystals
Crystal systemMonoclinic-prismatic
CleavageImperfect in one direction
Mohs Scale hardness5-5.5
LusterVitreous to dull
Refractive index1.607-1.672
StreakLight blue
Specific gravity3.25

Papagoite is a rare cyclosilicate mineral. Chemically, it is a calcium copper aluminium silicate hydroxide, found as a secondary mineral on slip surfaces and in altered granodiorite veins, either in massive form or as microscopic crystals that may form spherical aggregates. It was discovered in 1960 in Ajo, Arizona, USA, and was named after the Sand Papago peoples (now named Hia C-ed O'odham) that inhabit the area. This location is the only papagoite source within the United States, while worldwide it is also found in South Africa and Namibia. It is most strongly associated with ajoite, and is also found with quartz in South Africa. Its bright blue colour is the mineral's most notable characteristic.


  • MinDAT
  • Webmineral
  • Mineral galleries
  • Handbook of Mineralogy (PDF)
  • Exquisitecrystals
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Papagoite". A list of authors is available in Wikipedia.
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