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Coral
Coral

Lazulite
Lazulite



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Coral
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Lazulite

Coral and Lazulite Optical Properties

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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.03
Translucent
1.486-1.658
-
Trigonal
0.160-0.172
Translucent
 
-
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
0.01
Transparent, Translucent
1.604-1.646
-
monoclinic
0.031-0.036
Transparent

Coral and Lazulite Optic Character

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

Coral and Lazulite Transparency

Similar to their colors, Coral 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, Coral is while Coral is in appearance.