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Andalusite
Andalusite

Beryl
Beryl



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Andalusite
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Beryl

Andalusite and Beryl Optical Properties

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Optical Properties

Luster

Vitreous, Greasy
Vitreous, Resinous

Pleochroism

strongly trichroic
Weak to distinct

Dispersion

0.020.01
0.005 1
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Transparency

Transparent, Translucent
Transparent, Transparent to opaque

Refractive Index

1.627-1.6501.560-1.604
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Hexagonal

Birefringence

0.009-0.0100.0040-0.0070
0 0.296
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Clarity

Transparent
Transparent

Andalusite and Beryl Optic Character

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

Similar to their colors, Andalusite and Beryl 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.