Template:Sodalite
From The Gemology Project
Sodalite | |
---|---|
Chemical composition | Sodium Aluminium Silicate |
Crystal system | Cubic |
Habit | massive |
Cleavage | distinct, dodecahedral |
Fracture | conchoidal to uneven |
Hardness | 5.5-6.0 |
Refractive index | 1.478-1.488 |
Birefringence | none |
Specific gravity | 2.27 |
Lustre | Vitreous to greasy |