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Sugilite
Sugilite

Garnet
Garnet



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Sugilite
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Garnet

Sugilite and Garnet Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Adamantine

Pleochroism

Weak
None

Dispersion

0.020.02
0.005 1
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Transparency

Translucent
Transparent, Transparent to translucent

Refractive Index

1.607-1.6121.730-1.895
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Trigonal

Birefringence

0.003-9999
0 0.296
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Clarity

Translucent
Transparent

Sugilite and Garnet Optic Character

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

Sugilite and Garnet Transparency

Similar to their colors, Sugilite and Garnet 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, Sugilite is Translucent while Sugilite is Translucent in appearance.