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Andalusite
Andalusite

Verdite
Verdite



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Andalusite
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Verdite

Andalusite and Verdite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous, Silky

Pleochroism

strongly trichroic
Extreme

Dispersion

0.020.03
0.005 1
👆🏻

Transparency

Transparent, Translucent
Translucent

Refractive Index

1.627-1.6501.580
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

Birefringence

0.009-0.010-9999
0 0.296
👆🏻

Clarity

Transparent
Translucent

Andalusite and Verdite Optic Character

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

Similar to their colors, Andalusite and Verdite 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.