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Star Ruby
Star Ruby

Alunite
Alunite



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Star Ruby
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Alunite

Star Ruby and Alunite Optical Properties

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Optical Properties

Luster

-
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.757-1.7801.572
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.007-0.0100.020
0 0.296
👆🏻

Clarity

Transparent
-

Star Ruby and Alunite Optic Character

Star Ruby and Alunite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Star Ruby and Alunite 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 Star Ruby and Alunite 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.

Star Ruby and Alunite Transparency

Similar to their colors, Star Ruby and Alunite 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, Star Ruby is Transparent and Translucent while Star Ruby is Transparent and Translucent in appearance.