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Peridot
Peridot

Phosgenite
Phosgenite



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Peridot
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Phosgenite

Peridot and Phosgenite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Adamantine

Pleochroism

Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
Weakly pleochroic with O reddish and E greenish in thick sections.

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.64-1.692.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
tetragonal

Birefringence

0.0360.027
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Peridot and Phosgenite Optic Character

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

Peridot and Phosgenite Transparency

Similar to their colors, Peridot and Phosgenite 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, Peridot is Transparent while Peridot is Transparent in appearance.