Difference between revisions of "Labradorite"
From The Gemology Project
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Revision as of 12:31, 1 November 2006
Labradorite | |
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Chemical composition | Plagioclase feldspar |
Crystal system | Triclinic |
Habit | Aggregates |
Hardness | 5-5.5 |
Optic nature | Biaxial + |
Refractive index | 1.559-1.570 |
Birefringence | 0.008-0.011 |
Dispersion | Low |
Specific gravity | 2.70 |
Lustre | Vitreous |