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Garnet
Garnet

Ruby
Ruby



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Garnet
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Ruby

Garnet and Ruby Optical Properties

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Optical Properties

Luster

Vitreous, Adamantine
Vitreous, Adamantine

Pleochroism

None
Strong: purplish-red

Dispersion

0.020.02
0.005 1
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Transparency

Transparent, Transparent to translucent
Transparent, Translucent, Transparent to opaque

Refractive Index

1.730-1.8951.762-1.778
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Trigonal

Birefringence

-99990.008
0 0.296
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Clarity

Transparent
Transparent

Garnet and Ruby Optic Character

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

Garnet and Ruby Transparency

Similar to their colors, Garnet and Ruby 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, Garnet is Transparent and Transparent to translucent while Garnet is Transparent and Transparent to translucent in appearance.