Template:Larimar
From The Gemology Project
Larimar | |
---|---|
Chemical composition | NaCa2Si3O8(OH) |
Crystal system | triclinic |
Habit | aggregate |
Hardness | 5 |
Optic nature | biaxial + |
Refractive index | 1.59 - 1.63 |
Birefringence | 0.028-0.038 |
Specific gravity | 2.62 - 2.87 |
Lustre | silky |
Fluorescence | yellow or orange (SW-UV) |