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Axinite
Axinite

Topaz
Topaz



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Axinite
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Topaz

Axinite and Topaz Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Strong
Weak

Dispersion

0.020.01
0.005 1
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Transparency

-
Transparent

Refractive Index

1.656-1.7041.606-1.644
1 3.25
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Optic Character

Biaxial/+
-

Crystal System

Triclinic
Orthorhombic

Birefringence

0.009-0.0120.008-0.011
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Axinite and Topaz Optic Character

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

Similar to their colors, Axinite and Topaz 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.