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Ruby and Purpurite Optical Properties


Purpurite and Ruby Optical Properties


Optical Properties

Luster
Vitreous, Adamantine, Vitreous, Adamantine   
Not Available   

Pleochroism
Strong: purplish-red   
StrongArthur Thomas   

Dispersion
0.02   
21
Not Available   

Transparency
Transparent, Translucent, Transparent to opaque   
TranslucentWalter Schumann, Gemstones of the world (2001) More from other references   

Refractive Index
1.762-1.778   
1.85-1.92   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.008   
0.070   

Clarity
Transparent   
TranslucentWalter Schumann   

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Ruby and Purpurite Optic Character

Ruby and Purpurite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Ruby and Purpurite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Ruby and Purpurite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Ruby and Purpurite Transparency

Similar to their colors, Ruby and Purpurite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Ruby is Translucent, Transparent and Transparent to opaque while Ruby is Translucent, Transparent and Transparent to opaque in appearance.

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