Azurite

Physical Properties
Chemical formula Cu3(CO3)2(OH)2
Class Carbonate
Crystal system Monoclinic
Habit Massive
Earthy
Tabular (rare)
Prismatic (rare)
May form as a crust on
other copper minerals
Color Blue
Hardness 3.5 to 4
Specific gravity 3.77
Cleavage Brittle, perfect {011},
good {100}
Fracture Conchoidal
Luster Dull
Earthy
Vitreous
Transparency Transparent to translucent
Streak Blue
Optical Properties
PPL Blue
Pleochroic
XPL 5th order colors
δ 0.106
after Perkins, 389

Azurite in Hand Sample

Azurite (blue) and malachite (green)

Another, very similar sample of azurite and malachite

Azurite in Thin Section

Stay tuned!

Further Reading

Azurite at webmineral.com

Azurite at mindat.org