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Peridot
Peridot

Datolite
Datolite



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Peridot
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Datolite

Peridot and Datolite Optical Properties

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Optical Properties

Luster

Vitreous, Greasy
Vitreous

Pleochroism

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

Dispersion

0.020.02
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.64-1.691.621-1.675
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
monoclinic

Birefringence

0.0360.044
0 0.296
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Clarity

Transparent
Transparent

Peridot and Datolite Optic Character

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

Similar to their colors, Peridot and Datolite 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.