16.44: Kornerupine
- Page ID
- 4730
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Kornerupine | |
---|---|
Chemical composition | Complex borosilicate |
Crystal system | Orthorhombic |
Habit | Prismatic |
Cleavage | Prismatic |
Fracture | Conchoidal |
Hardness | 6.5 |
Optic nature | Biaxial - |
Refractive index | 1.67 -1.68 |
Birefringence | 0.013 |
Dispersion | Low, 0.019 |
Specific gravity | 3.28 - 3.35 |
Lustre | Vitreous |
Pleochroism | Distinct (green, yellow, brown) |
Figure \(\PageIndex{1}\): Faceted Kornerupine
Photo courtesy of The Gem Trader