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Childrenite
Childrenite

Sillimanite
Sillimanite



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Childrenite
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Sillimanite

Childrenite and Sillimanite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous, Subadamantine, Silky

Pleochroism

visible
Colourless to pale brown to yellow

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

Transparent
Transparent, Translucent

Refractive Index

1.639-1.6721.653-1.685
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.027-0.0420.020-0.022
0 0.296
👆🏻

Clarity

Transparent
Transparent

Childrenite and Sillimanite Optic Character

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

Childrenite and Sillimanite Transparency

Similar to their colors, Childrenite 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, Childrenite is Transparent while Childrenite is Transparent in appearance.