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Friedelite
Friedelite

Zoisite
Zoisite



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X
Friedelite
X
Zoisite

Friedelite and Zoisite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

Translucent
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.

Refractive Index

1.627-1.6631.685-1.707
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.032-0.0350.006-0.018
0 0.296
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Clarity

Translucent
Transparent

Friedelite and Zoisite Optic Character

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

Similar to their colors, Friedelite and Zoisite 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.