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Verdite
Verdite

Dumortierite
Dumortierite



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X
Verdite
X
Dumortierite

Verdite and Dumortierite Optical Properties

Optical Properties

Luster

Vitreous, Silky
Vitreous

Pleochroism

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

Dispersion

0.030.01
0.005 1
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Transparency

Translucent
Translucent, Translucent to opaque

Refractive Index

1.5801.669-1.723
1 3.25
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Optic Character

-
-

Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c
Orthorhombic

Birefringence

-99990.011-0.037
0 0.296
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Clarity

Translucent
Translucent

Verdite and Dumortierite Optic Character

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

Verdite and Dumortierite Transparency

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