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Peridot
Peridot

Montebrasite
Montebrasite



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Peridot
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Montebrasite

Peridot and Montebrasite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
-

Pleochroism

Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
-

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent
TransparentWalter Schumann

Refractive Index

1.64-1.691.578-1.646
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.0360.020-0.030
0 0.296
👆🏻

Clarity

Transparent
TransparentWalter Schumann

Peridot and Montebrasite Optic Character

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

Similar to their colors, Peridot and Montebrasite 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.