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Feldspar
Feldspar

Moonstone
Moonstone



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Feldspar
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Moonstone

Feldspar and Moonstone Optical Properties

Optical Properties

Luster

Vitreous
Pearly

Pleochroism

None
-

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent, Transparent to translucent

Refractive Index

1.518-1.5701.518-1.527
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Triclinic or monoclinic
monoclinic

Birefringence

0.008-0.0100.006-0.007
0 0.296
👆🏻

Clarity

Transparent
Transparent

Feldspar and Moonstone Optic Character

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

Similar to their colors, Feldspar and Moonstone 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.