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Axinite
Axinite

Andalusite
Andalusite



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Axinite
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Andalusite

Axinite and Andalusite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

Strong
strongly trichroic

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

1.656-1.7041.627-1.650
1 3.25
👆🏻

Optic Character

Biaxial/+
-

Crystal System

Triclinic
Orthorhombic

Birefringence

0.009-0.0120.009-0.010
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Axinite and Andalusite Optic Character

Axinite and Andalusite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Axinite 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 Axinite 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. Axinite has Biaxial/+ character.

Axinite and Andalusite Transparency

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