Difference between revisions of "Template:Amethyst"
From The Gemology Project
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! colspan=2 | Amethyst | ! colspan=2 | Amethyst | ||
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− | | Chemical composition || Silicon dioxide | + | | Chemical composition || Silicon dioxide SiO<sub>2</sub> |
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| Crystal system || Trigonal | | Crystal system || Trigonal |
Revision as of 02:07, 1 October 2006
Amethyst | |
---|---|
Chemical composition | Silicon dioxide SiO2 |
Crystal system | Trigonal |
Habit | edit me |
Cleavage | edit me |
Fracture | edit me |
Hardness | 7 |
Optic nature | edit me |
Refraction index | 1.544 - 1.553 |
Birefringence | 0.009 |
Dispersion | 0.013 |
Specific gravity | 2.63 - 2.65 |
Lustre | Vitreous |
Pleochroism | edit me |