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Andalusite
Andalusite

Vesuvianite Idocrase
Vesuvianite Idocrase



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Andalusite
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Vesuvianite Idocrase

Andalusite and Vesuvianite Idocrase Optical Properties

Optical Properties

Luster

Vitreous, Greasy
-

Pleochroism

strongly trichroic
-

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent

Refractive Index

1.627-1.6501.700-1.725
1 3.25
👆🏻

Optic Character

-
Uniaxial/-

Crystal System

Orthorhombic
-

Birefringence

0.009-0.0100.002-0.012
0 0.296
👆🏻

Clarity

Transparent
Transparent

Andalusite and Vesuvianite Idocrase Optic Character

Andalusite and Vesuvianite Idocrase optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Andalusite and Vesuvianite Idocrase 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 Vesuvianite Idocrase 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. Vesuvianite Idocrase has Uniaxial/- character.

Andalusite and Vesuvianite Idocrase Transparency

Similar to their colors, Andalusite and Vesuvianite Idocrase 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.