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Andalusite
Andalusite

Labradorite
Labradorite



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Andalusite
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Labradorite

Andalusite and Labradorite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous, Pearly

Pleochroism

strongly trichroic
-

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.627-1.6501.554-1.573
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Triclinic

Birefringence

0.009-0.0100.008-0.010
0 0.296
👆🏻

Clarity

Transparent
Transparent

Andalusite and Labradorite Optic Character

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

Andalusite and Labradorite Transparency

Similar to their colors, Andalusite and Labradorite 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, Andalusite is Transparent and Translucent while Andalusite is Transparent and Translucent in appearance.