Difference between revisions of "Template:Tanzanite"
From The Gemology Project
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! colspan=2 | Tanzanite | ! colspan=2 | Tanzanite | ||
|- | |- | ||
| − | | Chemical composition || Calcium | + | | Chemical composition || Calcium aluminum silicate |
|- | |- | ||
| − | | Crystal system || | + | | Crystal system || Orthorhombic |
|- | |- | ||
| − | | Habit || | + | | Habit || Prismatic |
|- | |- | ||
| − | | Cleavage || | + | | Cleavage || Perfect, prismatic |
|- | |- | ||
| − | | Fracture || | + | | Fracture || Uneven |
|- | |- | ||
| Hardness || 6.5 | | Hardness || 6.5 | ||
|- | |- | ||
| − | | Optic nature || | + | | Optic nature || Biaxial + |
|- | |- | ||
| Refractive index || 1.685-1.707 | | Refractive index || 1.685-1.707 | ||
| Line 21: | Line 21: | ||
| Birefringence || 0.008 | | Birefringence || 0.008 | ||
|- | |- | ||
| − | | Dispersion || | + | | Dispersion || Low, 0.012 |
|- | |- | ||
| Specific gravity || 3.35 | | Specific gravity || 3.35 | ||
|- | |- | ||
| − | | Lustre || | + | | Lustre || Vitreous |
|- | |- | ||
| − | | Pleochroism || | + | | Pleochroism || Strong trichroism (dichroism in heated) |
|} | |} | ||
Latest revision as of 20:02, 23 December 2006
| Tanzanite | |
|---|---|
| Chemical composition | Calcium aluminum silicate |
| Crystal system | Orthorhombic |
| Habit | Prismatic |
| 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 trichroism (dichroism in heated) |
