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Jacobsite
Jacobsite

Thulite
Thulite



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Jacobsite
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Thulite

Jacobsite and Thulite Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

-
Present

Dispersion

0.030.02
0.005 1
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Transparency

Translucent
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

Refractive Index

-99991.695
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

-99990.006-0.018
0 0.296
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Clarity

Translucent
OpaqueHerve Nicolas Lazzarelli

Jacobsite and Thulite Optic Character

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

Similar to their colors, Jacobsite and Thulite 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.