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Lazulite
Lazulite

Amethyst
Amethyst



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Lazulite
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Amethyst

Lazulite and Amethyst Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

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

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Translucent
Transparent, Transparent to translucent

Refractive Index

1.604-1.6461.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.031-0.0360.009
0 0.296
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Clarity

Transparent
Transparent

Lazulite and Amethyst Optic Character

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

Lazulite and Amethyst Transparency

Similar to their colors, Lazulite and Amethyst 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, Lazulite is Transparent and Translucent while Lazulite is Transparent and Translucent in appearance.