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Lazulite
Lazulite

Chalcedony
Chalcedony



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Lazulite
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Chalcedony

Lazulite and Chalcedony Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

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, Translucent
Translucent, Translucent to opaque

Refractive Index

1.604-1.6461.530-1.543
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.031-0.0360.003-0.009
0 0.296
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Clarity

Transparent
Translucent

Lazulite and Chalcedony Optic Character

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

Similar to their colors, Lazulite and Chalcedony 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.