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Axinite
Axinite

Norbergite
Norbergite



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Axinite
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Norbergite

Axinite and Norbergite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Strong
Pale yellow very pale yellow colorlessAnthony et al

Dispersion

0.020.02
0.005 1
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Transparency

-
Transparent

Refractive Index

1.656-1.7041.563-1.593
1 3.25
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Optic Character

Biaxial/+
-

Crystal System

Triclinic
-

Birefringence

0.009-0.012-9999
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Axinite and Norbergite Optic Character

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

Similar to their colors, Axinite and Norbergite 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.