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Feldspar
Feldspar

Friedelite
Friedelite



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Feldspar
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Friedelite

Feldspar and Friedelite Optical Properties

Optical Properties

Luster

Vitreous
-

Pleochroism

None
-

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

Transparent, Translucent
Translucent

Refractive Index

1.518-1.5701.627-1.663
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.008-0.0100.032-0.035
0 0.296
👆🏻

Clarity

Transparent
Translucent

Feldspar and Friedelite Optic Character

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

Feldspar and Friedelite Transparency

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