Azurite
Mineral Cu3(CO3)2(OH)2
Also called Chessylite and Blue copper ore
About it
Deep blue prisms, rosettes, and nodules with a light blue streak, often turning to green malachite. Classic sources are Bisbee, Arizona, Chessy, France, Tsumeb, Namibia, and Milpillas, Mexico.
- Type
- Mineral
- Group
- Carbonate (with hydroxide)
- Formula
- Cu3(CO3)2(OH)2
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 3.77–3.78
- Streak
- light blue
- Lustre
- vitreous (glassy), dull, earthy
- Crystal system
- Monoclinic
- Colours
- azure blue, deep blue
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in one direction; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.