Morion and Sillimanite Optical Properties

Morion

Sillimanite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous, Subadamantine, Silky

1.2 Pleochroism

Definite: brown reddish-brownWalter Schumann

Colourless to pale brown to yellow

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent, Translucent

1.5 Refractive Index

1.544-1.5531.653-1.685

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.0090.020-0.022

0 0.296

1.9 Clarity

Transparent

Morion and Sillimanite Optic Character

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

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