Difference between revisions of "Ruby"

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{|  align=right width=250px {{table}}
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{{ruby}}
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! colspan=2 | Ruby
 
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| Chemical composition || edit me
 
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| Crystal system || edit me
 
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| Habit || edit me
 
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| Cleavage || edit me
 
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| Fracture || edit me
 
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| Hardness || 9
 
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| Optic nature || edit me
 
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| Refaction index || edit me
 
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| Birefringence || edit me
 
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| Dispersion || edit me
 
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| Specific gravity || edit me
 
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| Lustre || edit me
 
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| Pleochroism || edit me
 
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__ToC__
 

Revision as of 23:23, 13 September 2006

Ruby
Chemical composition Al2O3
Crystal system Trigonal
Habit Prismatic, tabular
Cleavage None, twinned stones may show parting
Fracture Conchoidal
Hardness 9
Optic nature Uniaxial -
Refractive index 1.762-1.770
(+.009,-.005)
Birefringence 0.008-0.010
Dispersion Low, 0.018
Specific gravity 4
Lustre Vitreous to subadamantine
Pleochroism Strong; puplish-red to orangy-red