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Dumortierite
Dumortierite

Chrysoprase
Chrysoprase



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X
Dumortierite
X
Chrysoprase

Dumortierite and Chrysoprase Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Waxy

Pleochroism

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
-

Dispersion

0.010.01
0.005 1
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Transparency

Translucent, Translucent to opaque
Translucent, Opaque, Translucent to nearly opaque

Refractive Index

1.669-1.7231.530-1.543
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.011-0.0370.004
0 0.296
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Clarity

Translucent
Translucent

Dumortierite and Chrysoprase Optic Character

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

Dumortierite and Chrysoprase Transparency

Similar to their colors, Dumortierite and Chrysoprase 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, Dumortierite is Translucent and Translucent to opaque while Dumortierite is Translucent and Translucent to opaque in appearance.