Template:Ekanite
From The Gemology Project
Ekanite | |
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This data needs to evaluated | |
Chemical composition | ThCa2Si8O20 |
Crystal system | Tetragonal |
Habit | Elongated, pebbles. |
Cleavage | None |
Hardness | 6 - 6.5 |
Optic nature | Uniaxial - |
Refractive index | 1.560 - 1.596 |
Birefringence | 0.001-0.008 |
Dispersion | Low |
Specific gravity | 3.28 |
Lustre | Vitreous |