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Friedelite
Friedelite

Rubellite
Rubellite



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Friedelite
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Rubellite

Friedelite and Rubellite Optical Properties

Optical Properties

Luster

-
-

Pleochroism

-
Strong: dark red pinkish-redHerve Nicolas Lazzarelli

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

Translucent
Transparent, Translucent

Refractive Index

1.627-1.6631.614-1.666
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.032-0.0350.014-0.040
0 0.296
👆🏻

Clarity

Translucent
Transparent

Friedelite and Rubellite Optic Character

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

Friedelite and Rubellite Transparency

Similar to their colors, Friedelite and Rubellite 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.