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Amethyst
Amethyst

Omphacite
Omphacite



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Amethyst
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Omphacite

Amethyst and Omphacite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

None
Weak: colorless -- very pale green -- very pale green

Dispersion

0.010.02
0.005 1
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Transparency

Transparent, Transparent to translucent
TranslucentAnthony et al

Refractive Index

1.544-1.5531.662-1.723
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
-

Birefringence

0.009-9999
0 0.296
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Clarity

Transparent
TranslucentAnthony et al

Amethyst and Omphacite Optic Character

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

Amethyst and Omphacite Transparency

Similar to their colors, Amethyst and Omphacite 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, Amethyst is Transparent and Transparent to translucent while Amethyst is Transparent and Transparent to translucent in appearance.