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Andalusite
Andalusite

Peridot
Peridot



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Andalusite
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Peridot

Andalusite and Peridot Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous, Greasy

Pleochroism

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

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent

Refractive Index

1.627-1.6501.64-1.69
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.009-0.0100.036
0 0.296
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Clarity

Transparent
Transparent

Andalusite and Peridot Optic Character

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

Andalusite and Peridot Transparency

Similar to their colors, Andalusite 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, Andalusite is Transparent and Translucent while Andalusite is Transparent and Translucent in appearance.