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Narsarsukite
Narsarsukite

Sillimanite
Sillimanite



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Narsarsukite
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Sillimanite

Narsarsukite and Sillimanite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Subadamantine, Silky
1.2 Pleochroism
Weak; O = colorless to yellow; E = colorless to honey-yellow
Colourless to pale brown to yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent, Translucent
1.5 Refractive Index
1.610-1.6471.653-1.685
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
Orthorhombic
1.8 Birefringence
0.0210.020-0.022
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Narsarsukite and Sillimanite Optic Character

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

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