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Garnet
Garnet

Sellaite
Sellaite



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Garnet
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Sellaite

Garnet and Sellaite Optical Properties

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Optical Properties

Luster

Vitreous, Adamantine
Vitreous

Pleochroism

None
-

Dispersion

0.020.03
0.005 1
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Transparency

Transparent, Transparent to translucent
Transparent

Refractive Index

1.730-1.8951.378-1.390
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
tetragonal

Birefringence

-99990.012
0 0.296
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Clarity

Transparent
Transparent

Garnet and Sellaite Optic Character

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

Similar to their colors, Garnet and Sellaite 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.