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Friedelite
Friedelite

Axinite
Axinite



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Friedelite
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Axinite

Friedelite and Axinite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
Strong

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.627-1.6631.656-1.704
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

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

Birefringence

0.032-0.0350.009-0.012
0 0.296
👆🏻

Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Friedelite and Axinite Optic Character

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

Friedelite and Axinite Transparency

Similar to their colors, Friedelite and Axinite 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, Friedelite is Translucent while Friedelite is Translucent in appearance.