Difference between revisions of "Template:Rock Crystal"
From The Gemology Project
m |
|||
Line 3: | Line 3: | ||
! colspan=2 | Rock Crystal (Clear Quartz) | ! colspan=2 | Rock Crystal (Clear Quartz) | ||
|- | |- | ||
− | | Chemical composition || | + | | Chemical composition || SiO<sub>2</sub> Silicon dioxide |
|- | |- | ||
| Crystal system || [[Crystals_&_Their_Structure#Trigonal_Crystal_System | Trigonal]] | | Crystal system || [[Crystals_&_Their_Structure#Trigonal_Crystal_System | Trigonal]] | ||
|- | |- | ||
− | | Habit || | + | | Habit || Prismatic |
|- | |- | ||
− | | Cleavage || | + | | 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 || | + | | Dispersion || Low, 0.013 |
|- | |- | ||
| Specific gravity || 2.65 | | Specific gravity || 2.65 |
Revision as of 19:34, 23 December 2006
Rock Crystal (Clear Quartz) | |
---|---|
Chemical composition | SiO2 Silicon dioxide |
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 |