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Jacobsite
Jacobsite

Dumortierite
Dumortierite



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X
Jacobsite
X
Dumortierite

Jacobsite and Dumortierite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
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

-99991.669-1.723
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

-99990.011-0.037
0 0.296
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Clarity

Translucent
Translucent

Jacobsite and Dumortierite Optic Character

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

Jacobsite and Dumortierite Transparency

Similar to their colors, Jacobsite 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, Jacobsite is Translucent while Jacobsite is Translucent in appearance.