Difference between revisions of "Template:Rock Crystal"
From The Gemology Project
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| Crystal system || [[Crystals_&_Their_Structure#Trigonal_Crystal_System | Trigonal]] | | Crystal system || [[Crystals_&_Their_Structure#Trigonal_Crystal_System | Trigonal]] | ||
|- | |- | ||
− | | Habit || | + | | Habit || prismatic |
|- | |- | ||
| Cleavage || poor | | Cleavage || poor | ||
|- | |- | ||
− | | Fracture || | + | | Fracture || conchoidal |
|- | |- | ||
| Hardness || 7 | | Hardness || 7 | ||
|- | |- | ||
− | | Optic nature || | + | | Optic nature || uniaxial + |
|- | |- | ||
| Refractive index || 1.544 - 1.553 | | Refractive index || 1.544 - 1.553 | ||
Line 21: | Line 21: | ||
| Birefringence || 0.009 | | Birefringence || 0.009 | ||
|- | |- | ||
− | | Dispersion || 0.013 | + | | Dispersion || low, 0.013 |
|- | |- | ||
− | | Specific gravity || | + | | Specific gravity || 2.65 |
|- | |- | ||
| Lustre || Vitreous | | Lustre || Vitreous | ||
Line 29: | Line 29: | ||
| Pleochroism || None | | Pleochroism || None | ||
|} | |} | ||
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Revision as of 04:27, 9 November 2006
Rock Crystal (Clear Quartz) | |
---|---|
Chemical composition | Silicon Dioxide SiO2 |
Crystal system | Trigonal |
Habit | prismatic |
Cleavage | poor |
Fracture | conchoidal |
Hardness | 7 |
Optic nature | uniaxial + |
Refractive index | 1.544 - 1.553 |
Birefringence | 0.009 |
Dispersion | low, 0.013 |
Specific gravity | 2.65 |
Lustre | Vitreous |
Pleochroism | None |