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Cavansite
Cavansite

Iolite
Iolite



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Cavansite
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Iolite

Cavansite and Iolite Optical Properties

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Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

Visible: X=Z= colorless Y= blue
-

Dispersion

0.040.02
0.005 1
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Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.5421.52-1.56
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.009-9999
0 0.296
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Clarity

-
Transparent to translucent

Cavansite and Iolite Optic Character

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

Cavansite and Iolite Transparency

Similar to their colors, Cavansite and Iolite 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, Cavansite is while Cavansite is in appearance.