Padparadscha and Sillimanite Optical Properties

Padparadscha

Sillimanite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous, Subadamantine, Silky

1.2 Pleochroism

Not Available

Colourless to pale brown to yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

1.5 Refractive Index

1.757-1.7801.653-1.685

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.007-0.0100.020-0.022

0 0.296

1.9 Clarity

Transparent

Padparadscha and Sillimanite Optic Character

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

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Padparadscha and Sillimanite Transparency

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