Difference between revisions of "Template:Chalcedony"
From The Gemology Project
Africanuck (talk | contribs) |
Africanuck (talk | contribs) |
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| Optic nature || edit me | | Optic nature || edit me | ||
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− | | | + | | Refractive index || 1.544 - 1.553 |
|- | |- | ||
| Birefringence || 0.009 | | Birefringence || 0.009 |
Revision as of 11:37, 1 November 2006
Chalcedony | |
---|---|
Chemical composition | Silicon dioxide SiO2 |
Crystal system | Trigonal |
Habit | edit me |
Cleavage | edit me |
Fracture | edit me |
Hardness | 7 |
Optic nature | edit me |
Refractive index | 1.544 - 1.553 |
Birefringence | 0.009 |
Dispersion | 0.013 |
Specific gravity | 2.63 - 2.65 |
Lustre | Vitreous |
Pleochroism | edit me |