Difference between revisions of "Template:Chrysoberyl"
From The Gemology Project
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| Chemical composition || BeAl<sub>2</sub>O<sub>4</sub> | | Chemical composition || BeAl<sub>2</sub>O<sub>4</sub> | ||
|- | |- | ||
− | | Crystal system || | + | | Crystal system || Orthorombic |
|- | |- | ||
− | | Habit || | + | | Habit || Pseudo-hexagonal twins |
|- | |- | ||
− | | Cleavage || | + | | Cleavage || Weak to moderate |
|- | |- | ||
− | | Fracture || | + | | Fracture || Conchoidal to uneven |
|- | |- | ||
| Hardness || 8.5 | | Hardness || 8.5 | ||
|- | |- | ||
− | | Optic nature || | + | | Optic nature || Biaxial + |
|- | |- | ||
| Refractive index || 1.74-1.75 | | Refractive index || 1.74-1.75 | ||
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| Birefringence || 0.009 | | Birefringence || 0.009 | ||
|- | |- | ||
− | | Dispersion || | + | | Dispersion || Low, 0.014 |
|- | |- | ||
| Specific gravity || 3.72 | | Specific gravity || 3.72 | ||
|- | |- | ||
− | | Lustre || | + | | Lustre || Bright vitreous |
|- | |- | ||
− | | Pleochroism || | + | | Pleochroism || Moderate to strong |
|} | |} |
Latest revision as of 18:18, 22 December 2006
Chrysoberyl | |
---|---|
Chemical composition | BeAl2O4 |
Crystal system | Orthorombic |
Habit | Pseudo-hexagonal twins |
Cleavage | Weak to moderate |
Fracture | Conchoidal to uneven |
Hardness | 8.5 |
Optic nature | Biaxial + |
Refractive index | 1.74-1.75 |
Birefringence | 0.009 |
Dispersion | Low, 0.014 |
Specific gravity | 3.72 |
Lustre | Bright vitreous |
Pleochroism | Moderate to strong |