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Gedrite
Gedrite

Andalusite
Andalusite



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Gedrite
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Andalusite

Gedrite and Andalusite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

Weak to moderate
strongly trichroic

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent
Transparent, Translucent

Refractive Index

1.625-1.7181.627-1.650
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Orthorhombic

Birefringence

-99990.009-0.010
0 0.296
👆🏻

Clarity

Transparent
Transparent

Gedrite and Andalusite Optic Character

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

Gedrite and Andalusite Transparency

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