Template:Azurite
From The Gemology Project
Azurite | |
---|---|
Chemical composition | Cu3(CO3)2(OH)2 |
Crystal system | Monoclinic |
Habit | Short columlar, botryoidal |
Cleavage | Indistinct |
Fracture | Conchoidal, uneven, brittle |
Hardness | 3 1/2 - 4 |
Optic nature | Biaxial + |
Refractive index | 1.720-1.848 |
Birefringence | 0.108-0.110 |
Specific gravity | 3.7-3.9 |
Lustre | Vitreous |
Pleochroism | Light blue, dark blue |