Spectrolite
From The Gemology Project
Revision as of 11:28, 18 October 2006 by Africanuck (talk | contribs)
Spectrolite | |
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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 |