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Feldspar
Feldspar

Peridot
Peridot



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Feldspar
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Peridot

Feldspar and Peridot Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

None
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli

Dispersion

0.010.02
0.005 1
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Transparency

Transparent, Translucent
Transparent

Refractive Index

1.518-1.5701.64-1.69
1 3.25
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Optic Character

-
-

Crystal System

Triclinic or monoclinic
Orthorhombic

Birefringence

0.008-0.0100.036
0 0.296
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Clarity

Transparent
Transparent

Feldspar and Peridot Optic Character

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

Similar to their colors, Feldspar and Peridot 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.