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Amethyst
Amethyst

Lazulite
Lazulite



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Amethyst
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Lazulite

Amethyst and Lazulite Optical Properties

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Optical Properties

Luster

Vitreous
-

Pleochroism

None
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Transparent to translucent
Transparent, Translucent

Refractive Index

1.544-1.5531.604-1.646
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.0090.031-0.036
0 0.296
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Clarity

Transparent
Transparent

Amethyst and Lazulite Optic Character

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

Similar to their colors, Amethyst and Lazulite 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.