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Narsarsukite
Narsarsukite

Thulite
Thulite



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Narsarsukite
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Thulite

Narsarsukite and Thulite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

Weak; O = colorless to yellow; E = colorless to honey-yellow
Present

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

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

Refractive Index

1.610-1.6471.695
1 3.25
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Optic Character

-
-

Crystal System

tetragonal
Orthorhombic

Birefringence

0.0210.006-0.018
0 0.296
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Clarity

Transparent
OpaqueHerve Nicolas Lazzarelli

Narsarsukite and Thulite Optic Character

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

Narsarsukite and Thulite Transparency

Similar to their colors, Narsarsukite 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, Narsarsukite is Transparent and Translucent while Narsarsukite is Transparent and Translucent in appearance.