16.07: Zoisite
- Page ID
- 4127
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Zoisite | |
---|---|
Chemical composition | Calcium aluminum silicate |
Crystal system | Orthorhombic |
Habit | Prismatic and massive |
Cleavage | Perfect, prismatic |
Fracture | Uneven |
Hardness | 6.5 |
Optic nature | Biaxial + |
Refractive index | 1.685-1.707 |
Birefringence | 0.008 |
Dispersion | Low, 0.012 |
Specific gravity | 3.35 |
Lustre | Vitreous |
Pleochroism | Strong in blue |
Figure \(\PageIndex{1}\): Zoisite with ruby bead