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Amethyst
Amethyst

Beryl
Beryl



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Amethyst
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Beryl

Amethyst and Beryl Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

None
Weak to distinct

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Transparent to translucent
Transparent, Transparent to opaque

Refractive Index

1.544-1.5531.560-1.604
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Hexagonal

Birefringence

0.0090.0040-0.0070
0 0.296
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Clarity

Transparent
Transparent

Amethyst and Beryl Optic Character

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

Similar to their colors, Amethyst and Beryl 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.